Subject | ASA | USSSA |
Pitching Distance | Rule 2, Section 1: 10U: 35’ 12U: 40’ 14U: 40’ 16U: 40’ (43’ in 2011) 18U: 43’ | Rule 1, Section 1: 10U: 35’ 12U: 40’ 14U: 40’ (43’ in 2011) 16U: 43’ 18U: 43’ |
Double First Base | Rule 2, Section 3H: Double first base mandatory | Rule 1, Section 2B: Double first base optional |
Strike on a bunt attempt | Rule Supplement #10 On a bunt attempt and the pitched ball is out of the strike zone, a ball should be called unless the batter moves the bat toward the ball. | Rule 3, Section 13: In order to take a pitch, the bat must be pulled back from the ball. |
Mercy Rule | Rule 5, Section 9: 15 runs after 3 innings 12 runs after 4 innings 8 runs after 5 innings | Rule 4, Section 4: 12 runs after 3 innings 10 runs after 4 innings 8 runs after 5 innings |
Lineup | Rule 4, Section 1C1a: 9 position players 1 Designated Player (optional) | Rule 5, Section 3 and 4: 9 position players 1 Designated Hitter (optional) Up to 2 additional players (optional) |
Lineup Card | Rule 7, Section 2B2: If DP/Flex is used, Flex player is listed as the 10th player in the lineup. | Rule 5, Section 4: The defensive player for which the DH bats is listed after the DH in the same lineup spot. |
Use of DP/DH | Rule Supplement #15 J and K: The DP can play defense for any player in any position. Should the DP play defense for any position other than the FLEX, that position player continues to bat and does not play defense. The role of DP/FLEX is never terminated. A team can go back and forth between 9 and 10 players any number of times in a game. | Rule 5, Section 4A and 4B: The DH is terminated for the rest of the game if the defensive player subsequently bats, pinch hits, or pinch runs for the DH. The DH is terminated if the DH assumes a position in the field. |
Note that while ASA uses the term “Designated Player” (DP) and USSSA uses “Designated Hitter” (DH), both the DP and the DH are functionally equivalent. Also, while I list USSSA age divisions the same as ASA age divisions, USSSA actually designates each age as its own division (i.e. there is an 11U division, a 13U division, etc).
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