A comparison of the differences betweenbaseball andsoftball can be made as softball is directly descended from baseball. An observer of one game would find the other very similar, but there are several important rule differences.
Fastpitch softball is more popular in competitive leagues, especially at the college and international tournament levels, while slow pitch is more popular in recreationalleagues where the relative skill levels of different players may vary widely. The different rules of slowpitch can be viewed as maintaining a competitive balance for less skilled players by eliminating certain strategies (e.g., base stealing and bunting) which require a high level of skill to counter. Additionally, recreational leagues may impose their own ground rules, either for competitive balance or to meet local constraints (e.g., a time limit may be imposed on a game to ensure multiple games can be played in one day).A regulation softball is significantly larger than a regulation baseball. A softball measures between 11.88 and 12.13 inches in circumference and weighs between 6.25 and 7.00 ounces; a baseball measures between 9.00 and 9.25 inches in circumference and weighs between 5.00 and 5.25 ounces.
| Baseball | Fastpitch softball | Slowpitch softball | |
|---|---|---|---|
| Game length | 9innings (7 inMinor League, high school, and college doubleheaders; 6 inLittle League) | 7 innings | 7 innings |
| Equipment | |||
| Ball |  |  | |
| 9–9.25 inches (22.9–23.5 cm) in circumference, 5–5.25 ounces (142–149 g) in weight, always white | 11.875–12.125 inches (30.16–30.80 cm) in circumference, 6.25–7 ounces (177–198 g) in weight. (11 inches (280 mm) for children 10 and under), less dense than abaseball, optic yellow | 12 inches (300 mm) in circumference for men, 11 inches (280 mm) for women; less dense than abaseball, white or optic yellow | |
| Bat |  | .jpg) | |
| 2.25–2.625 inches (5.72–6.67 cm) in diameter and no longer than 42 inches (110 cm). Must be made of wood at the professional level; may be made of aluminum in high school and college. | No more than 2.28125 inches (5.7944 cm) in diameter, no longer than 34 inches (86 cm) and no more than 38 ounces (1,100 g) in weight. Most commonly made of composite materials or aluminum, though wooden bats may be used | ||
| Field | |||
| Layout diagram |  |  | |
| Baselines | 90 feet (27 m) | 60 feet (18 m) | |
| Double first base | No, except in youth leagues such asLittle League | Used in games underWBSC rules; not used inNCAA | Allowed |
| Outfield fence | Variable distance fromhome plate is mandatory in professional and university leagues and optional in youth leagues. Many youth leagues, such asLittle League, use a constant distance from home plate.[1] | Variable distance from home plate, depending on the individual field. (maximum of 250 ft (76 m))[2] | Constant distance from home plate, although some less organized leagues have no fences. |
| Pitching distance | 60 feet 6 inches (18.44 m) | Varies by level: 40 feet (12 m) (youth), 43 feet (13 m) (adult women) or 46 feet (14 m) (adult men) | Varies by level: 46 feet (14 m) (youth), 50 feet (15 m) (adult) |
| Pitcher's area | Raised sloping mound, radius of 9 feet (2.7 m), maximum height 10 inches (25 cm) | Flat circle, the radius of 8 feet (2.4 m), marked with a white chalk circle | Pitching rubber only |
| Players | |||
| Fielders | Nine | Nine | Ten (fourth outfielder) |
| Extra player | Adesignated hitter (DH) may bat in place of a pitcher (rule varies by league; some levels allow DHs for other fielders) | Onedesignated player (DP) may bat in place of a fielder. | Some leagues allow an arbitrary number ofextra players, up to the entire roster. |
| Substitution | No player substituted for may return to the game, including the replaced player if the DH takes a defensive position. Under high school rules in the United States, a player may be substituted for and return to the game once. A pitcher who leaves the game may return, but only as a fielder (not the pitcher or DH). | Free defensive substitutions, provided each player occupies the same position in the batting order. If the DP takes a defensive position, the replaced player cannot return to the game. | Free defensive substitutions, provided each player occupies the same position in the batting order. |
| Batter | |||
| Bunting | Allowed. | Allowed. | Not allowed; the batter is out if contact is made. |
| Foul ball with two strikes | Batter is not out unless bunting. | Batter is not out unless bunting. | Batter is generally out. In many recreational leagues, a batter is allowed one foul ball with two strikes, with the second being an automatic out. |
| Hit by a pitch | Awarded first base unless swing, pitch in the strike zone, or no attempt made to avoid being hit. | Awarded first base unless swing, pitch in the strike zone, or attempt made to intentionally be hit, although this is rarely called by the umpire. | Not awarded first base. |
| Runner | |||
| Base stealing | Allowed at any time the ball is live (i.e. when "time" is not called). | Allowed once the ball leaves the pitcher's hand; runners may not leave base if the pitcher has the ball within the circle. | Generally not allowed, although some levels may permit stealing after a pitched ball crosses the plate or touches the ground. |
| Leading from base | Same rules as for base stealing | Same rules as for base stealing | Runner is usually permitted to take a lead after the ball leaves the pitcher's hand, but must return to base between pitches if the ball is not put into play. The runner can be called out for taking a lead before the pitch. |
| Pitching | |||
| Delivery | .jpg) | .jpg) |  |
| Any method; in practice, usually overhand. | Underhand; no speed or arc restrictions. | Underhand; must travel in an arc and within certain height restrictions (a common range is between 6 and 12 feet (1.8 and 3.7 m) above the ground). Umpire can call a pitch "illegal" while in flight. | |
| Illegal pitch | Most infractions punished as abalk. | The ball remains live. If the batter reaches base successfully and all runners advance, no penalty; otherwise, the play is negated, the pitch attempt is automatically a ball and runners advance one base. | The ball remains live. If the batter does not swing, the pitch is automatically a ball. |
