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Slow-Pitch Softball Glossary
Learn the language of Slow-Pitch Softball — answer-first definitions with real examples, beginner to pro.
93 terms
- 16-Inch Softball (Chicago Softball)Beginner16-inch softball is a slow-pitch game played with a bigger ball, at least 16 inches around. It was invented in Chicago in 1887 and is still a Chicago tradition, known for fielders playing bare-handed. Under USA Softball rules, men pitch from 38 feet with 60-foot bases. Unlike regular slow pitch, runners may lead off and be picked off.
- ArcBeginnerThe arc is the high, looping flight path a legal slow-pitch delivery must follow. USA Softball requires a peak between 6 and 10 feet (12 feet in senior play). USSSA instead requires at least 3 feet of arc above the release point and caps height at 10 feet above the ground. Hitters time their swing to the ball's descent, not its rise.
- Arc Height RegulationBeginnerArc height regulation defines the required minimum and maximum height a slow-pitch delivery must reach — 6 to 10 feet under USA Softball rules, and up to 12 feet in senior and international (WBSC) play — to be called a legal pitch.
- At-Bat Routine (Slow-Pitch)BeginnerA short, repeatable routine before you hit helps in slow pitch, even in a rec league. Use the same few steps each time: time the pitcher's arc from on deck, set your spot in the box, take one breath and pick one plan. After a bad swing, step back, breathe and run the same steps again. Keep it quick, since the at-bat starts at one ball and one strike.
- Backing Up a ThrowBeginnerBacking up a throw means a defender not directly in the play moves behind the receiving fielder. The goal is to stop an overthrow from becoming extra bases.
- Bad HopBeginnerA bad hop is a ground ball that bounces unpredictably off a seam, rock, or divot in the infield. It changes direction or height at the last instant.
- Ball Flight Off the BatBeginnerBall flight off the bat is the mix of exit speed, launch angle, and spin. Together they decide if a ball is a line drive, grounder, fly ball, or pop-up.
- Ball SpecificationsBeginnerStandard slow-pitch softball specifications call for a 12-inch circumference ball with a defined COR and compression rating. Men's and co-ed leagues commonly use a 12-inch ball; some senior and mixed leagues use an 11-inch ball.
- Bat CertificationBeginnerBat certification is official approval from a sanctioning body (ASA/USA Softball, USSSA, NSA, ISA, etc.) confirming a bat meets performance and safety standards for league play.
- Bat Grip (Slow-Pitch)BeginnerHold a slow-pitch bat in your fingers with the hands touching and the knuckles roughly lined up. Many slow-pitch hitters slide the bottom hand down so the little finger, or more, wraps over the knob. That adds leverage with a heavier or end-loaded bat. Choking up is less common in slow pitch except for placement hitting.
- Bat LengthBeginnerBat length is measured in inches from knob to end cap. Most adult slow-pitch bats run 34 inches; a longer bat adds reach and potential leverage but is harder to control.
- Bat Weight / DropBeginnerBat weight is measured in ounces. The "drop" is the difference between length (inches) and weight (ounces) — a 34-inch, 26-ounce bat is a drop -8. Most adult slow-pitch bats weigh 26–28 ounces.
- Batter's Box Rules (Slow-Pitch)BeginnerYou are out in slow pitch if you hit the ball while any part of a foot is touching home plate, or while an entire foot is on the ground completely outside the batter's box. The ball is dead. USSSA applies that rule to the side and back lines, and it limits how far forward your rear foot can start.
- Batting Average, Slugging and ISO in Slow PitchBeginnerThere is no single good slugging percentage for slow pitch, because it changes with your league's home run limit, fences and level. Slugging is total bases divided by at-bats. Batting average is hits divided by at-bats, and isolated power is slugging minus average. Compare yourself with hitters in your own league and division, not with baseball numbers.
- Batting GlovesBeginnerBatting gloves are thin gloves worn on one or both hands for hitting. They improve grip, reduce vibration, and protect against blisters during long sessions.
- Batting Helmets in Slow PitchBeginnerAdults usually do not have to wear batting helmets in slow pitch. USA Softball requires them for all youth players and in adult fast pitch, but not for adult slow pitch. Any player may still wear a helmet or face guard at any time, and USA Softball recommends helmets for runners. Your league can add its own helmet rule.
- Batting Stance (Slow-Pitch)BeginnerA good slow-pitch stance is relaxed and balanced, with feet about shoulder-width apart and weight on the balls of the feet. Keep your hands near your back shoulder and stand where the barrel covers the outer edge of the plate. The slow arc gives you time. Keep the stance quiet and simple.
- Bunting and Chopping Rule (Slow-Pitch)BeginnerNo, you cannot bunt or chop the ball in slow pitch. Under USA Softball and USSSA rules, a batter who does either is out, and the ball is dead. A chop is a downward chopping swing meant to pound the ball into the ground, and the plate umpire decides whether a swing was one.
- Check Swing (Slow-Pitch)BeginnerA check swing is when a hitter starts a swing but stops the bat short. Umpires judge whether the bat crossed the plate's plane or the wrists rolled over.
- Choosing a Bat for Women in Coed Slow PitchBeginnerWomen in coed should use a certified slow-pitch bat light enough to swing on time with a short, level path. Many women hit best with a balanced or lightly end-loaded model they can control. In USA Softball coed, women hit an 11-inch ball and men hit a 12-inch ball, but the same official-bat rules apply to every batter. Your league's stamp rule decides between a USA Softball and a USSSA bat.
- Choosing a Slow-Pitch BatBeginnerNo single bat is right for everyone. Start with the certification stamp your league requires, then pick the heaviest bat you can still swing fast and on time. A balanced bat is easier to control and suits newer players and line-drive hitters. An end-loaded bat suits strong hitters who can swing it without being late.
- Chopper and Other Softball SlangBeginnerA chopper is a ground ball that hits the dirt hard near the plate and bounces high, so a fielder has to wait for it. In slow pitch, a chopper off a normal swing is legal. A deliberate downward chop is not, because USA Softball calls the batter out for chopping the ball. Other slang: a bomb is a home run, a frozen rope is a hard line drive, and a walk-off ends the game.
- Chopping Down on the BallBeginnerChopping down on the ball is an exaggerated, near-vertical bat path. It hacks down instead of rotating, usually giving weak, high-bouncing grounders.
- Coed Rules (Modified Slow-Pitch)BeginnerCoed rules adapt slow-pitch softball for mixed-gender rosters. They often cover batting order, lineup balance, and who may field certain balls.
- Coed Walk RuleBeginnerIn coed slow pitch, a walk to a man is worth two bases. Under USA Softball rules he goes to second, and the next batter, a woman, must bat unless there are two outs. With two outs she may choose to walk or bat. Under USSSA rules he is awarded first and second, and the next woman always has that choice.
- Commitment Line Rule (Senior Softball)BeginnerThe commitment line is a mark 20 feet before the second home plate in senior slow pitch. Once a runner passes it, the runner cannot go back to third base. Under USA Softball senior rules, a runner who returns is out. The line works with the second home plate so runners and catchers stay apart at home.
- Composite Bat Break-In and RotationBeginnerMany composite bats perform best after a break-in of a few hundred hits with regular softballs. Start with easy tee swings, build to full swings and turn the bat a little after every hit to spread the wear. Some newer composites are sold game-ready. Follow the instructions that came with your bat.
- Composite vs Alloy BatsBeginnerAlloy bats are made of aluminum alloy, and composite bats of layered carbon fiber and resin. Alloy bats are usually ready to use new, handle cool weather better and tend to cost less. Composite bats often feel smoother on mishits but may need a break-in and can crack in the cold.
- Contact PointBeginnerThe contact point is where the bat meets the ball relative to your body. In slow pitch it sits out in front of the plate, letting the barrel travel slightly upward to match the ball's descending arc rather than hitting under or over it.
- Courtesy RunnerBeginnerA courtesy runner is a substitute allowed to run the bases for a player who reaches base but is unable to run. That player stays in the game; common reasons include injury, age-based recreational-league eligibility, or a pitcher/catcher who needs rest between innings.
- Double First Base (Safety Base)BeginnerA double first base, or safety base, pairs a white half in fair territory with a colored bag, often orange, in foul territory. On a play at first, the batter-runner touches the orange side and the fielder takes the white one, so they stay apart. USA Softball uses it at first in all divisions; in USSSA it is optional.
- Dropped Third Strike in Slow PitchBeginnerNo, slow pitch has no dropped third strike. Under USA Softball rules, the batter is out on a third strike whether or not the catcher holds the ball. Only fast pitch and modified pitch let a batter run on an uncaught third strike. In slow pitch, a foul ball with two strikes is also an out.
- Extra Player (EP) RuleBeginnerThe extra player (EP) rule lets a slow-pitch team bat more players than it fields. Only ten, or the league's standard number, play defense at a time.
- Fence DistanceBeginnerFence distance is the measured distance from home plate to the outfield fence. Standard slow-pitch fields run 275–315 feet down the lines and 275–325 feet to center, though recreational parks vary widely.
- Field Dimensions (Slow-Pitch)BeginnerSlow-pitch field dimensions cover base paths (commonly 65 feet), pitching distance, and fence distance, which vary by league and division.
- Follow-ThroughBeginnerThe follow-through continues the swing after contact. The bat completes its arc, the arms extend fully, and the body finishes balanced and weight-forward.
- Footwear / CleatsBeginnerCleats provide traction on dirt and grass fields. Metal cleats are often restricted in recreational slow-pitch leagues; molded rubber or plastic cleats are the standard for safety and field preservation.
- Force PlayBeginnerA force play is an out recorded by a fielder simply touching the base ahead of a runner who is required to advance. No tag is needed, because the runner has to advance to make room for the batter-runner or a trailing runner.
- Foul Ball With Two Strikes (Slow-Pitch)BeginnerUnder USA Softball slow-pitch rules, a foul ball with two strikes is strike three and the batter is out. Every slow-pitch foul counts as a strike, and the rule book has no courtesy foul. USSSA is different: batters start at 0-0 and are out on two strikes, and an uncaught foul is a strike only with no strikes. Local leagues can differ too, so check your league's rules.
- Getting Started in Slow-Pitch SoftballBeginnerTo start slow pitch, the equipment you need is a glove, molded cleats and a bat with your league's required stamp. Then learn the rules that differ from baseball. Pitches come in underhand on a high arc, there is no bunting, and runners cannot lead off. At the plate, wait for the ball to drop and aim for line drives, not towering fly balls.
- Glove – Slow-PitchBeginnerA slow-pitch softball glove is sized for the larger 12-inch ball — usually 12 to 13.5 inches for infielders, up to 14 inches for outfielders — with a deeper, wider pocket than a baseball glove.
- Home Run LimitBeginnerA home run limit caps how many over-the-fence home runs a team may hit in a game. Under USA Softball rules, the cap depends on the division: 1 in Class E/Rec, 3 in Class D, 5 in Class C, 7 in Men's Class B, 8 in Coed Open, 10 in Class A and 12 in Class AA. A home run over the limit is an out, the ball is dead and no runners advance. USSSA and local leagues set their own limits, so check yours.
- How Long a Slow-Pitch Bat LastsBeginnerA slow-pitch bat lasts a number of hits, not a number of years. One maker says a bat's life depends mostly on how many hits it takes. Heavy team use, cold weather and cage balls shorten it. Retire a bat when it cracks, dents or rattles, because USA Softball rules require a bat free of cracks, dents, rattles and heavy wear.
- Illegal Bat ListBeginnerAn illegal bat list names bat models that a softball association has removed from legal play. Testing may show that a listed bat exceeds the allowed performance limit.
- Illegal PitchBeginnerAn illegal pitch is any delivery that breaks the pitching rules. Most commonly, it is a pitch outside the legal arc window, a pitch thrown too fast, or a start or release from an illegal position.
- Injury Prevention for Rec Softball PlayersBeginnerMany rec softball injuries happen when adults go from sitting all week to sprinting and throwing hard with no warm-up. A 10-minute warm-up of light jogging, leg swings, skips and build-up sprints helps prepare the legs. A slow throwing progression does the same for the arm. Stay active between games, and stop if something hurts.
- Inside vs Outside PitchBeginnerAn inside pitch crosses the inner half of the plate, nearest the hitter; an outside pitch crosses the outer half, away from the hitter. Each requires a different contact point and field direction.
- ISA League FormatBeginnerISA (Independent Softball Association) is a regional or specialty slow-pitch sanctioning body. Teams must check its own bat list and rules separately.
- Legal DeliveryBeginnerA legal delivery in slow-pitch softball is a pitch that is released underhand with a smooth, continuous motion and arrives within the required arc height — between 6 and 10 feet under USA Softball rules — over the plate.
- LoadBeginnerThe load is the backward weight shift and hand coil that sets the hitter in a ready, wound-up position before initiating the swing. In slow pitch, the load must happen early and hold while the long-arcing ball descends.
- Mercy RuleBeginnerThe mercy rule is the informal name for the run rule. The rule that ends a game early when the scoring gap becomes too large to be competitive, protecting player safety and league scheduling.
- One-and-One Count (Slow-Pitch)BeginnerThe one-and-one count is a common slow-pitch rule variation where every at-bat starts 1-1, not 0-0. It shortens at-bats to keep games moving.
- Overswinging (Trying to Kill the Ball)BeginnerOverswinging means swinging so hard that you lose control of the swing. The head pulls off, the front shoulder flies open and the timing breaks down. The result is rollovers, pop-ups and misses. Many coaches suggest a controlled swing at about 80 percent effort, aimed at solid contact.
- Pinch Hitting, Re-Entry and Batting Out of Order (Slow-Pitch)BeginnerYes, you can pinch hit in slow pitch. Under USA Softball rules, a substitute takes the removed player's spot in the batting order and must be reported to the plate umpire. Any player may leave and re-enter once, but only in the same batting spot. If someone bats out of order, the defense must appeal in time, and the player who should have batted is out.
- Pitch SpeedBeginnerPitch speed in slow-pitch softball is how fast the ball travels from the pitcher to the plate, usually 25–35 mph. Many leagues impose a maximum speed limit to maintain the recreational character of the game.
- Pitch TrackingBeginnerPitch tracking is following the slow-pitch ball with your eyes from release, through its peak, to contact. It is the key to timing a steeply falling ball.
- Pitcher Face Masks in Slow PitchBeginnerAdult slow-pitch pitchers do not have to wear a mask under USA Softball rules, but it is a sensible choice. Any defensive player may wear a face mask or helmet at any time. The pitcher stands 50 feet from the plate in adult play and has little time to react to a hard line drive. Your league may require masks, so check its rules.
- Pitching DistanceBeginnerPitching distance is how far the pitcher's plate is from home plate. Adult slow pitch is pitched from 50 feet under both USA Softball and USSSA rules, and USA Softball's youth divisions use 40, 46 or 50 feet by age. USA Softball lets Class C, D and E/Rec pitchers start up to 6 feet behind the pitcher's plate, or 10 feet in senior play. USSSA requires the pivot foot to touch the plate when the ball is released.
- Pitching Machines for Slow-Pitch PracticeBeginnerYes, but only a machine or feeder that lobs a real arc is worth using for slow-pitch timing. A machine that fires the ball on a flat line trains timing you will never see in a game. Set the arc so the ball drops through the zone like a game pitch, from a realistic distance. If you cannot, a partner who throws a true slow-pitch arc is better.
- Pitching RubberBeginnerThe pitching rubber is the white rubber slab on the pitcher's mound from which the pitcher must begin and complete a legal delivery. Leaving or dragging off the rubber incorrectly results in an illegal pitch.
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