Travel / tournament · 2026/2027 rules, 13 Bat Rules
| Division | Allowed certifications | Max drop | Max barrel | Max length | Notes | Find bats |
|---|---|---|---|---|---|---|
| 8U-12U | USSSA 1.15 BPF BBCOR .50 One-piece wood | not stated | not stated | not stated | Non-wood bats must be USSSA 1.15 BPF or carry a BESR imprint; BBCOR legal. No weight/length ratio restriction. | USSSA BBCOR Wood (one-piece) |
| 13U | USSSA 1.15 BPF BBCOR .50 One-piece wood | -5 | not stated | not stated | -5 (1.15 BPF/BESR) or -3 BBCOR. | USSSA BBCOR Wood (one-piece) |
| 14U | USSSA 1.15 BPF BBCOR .50 One-piece wood | -3 | not stated | not stated | -3 (1.15 BPF/BESR) or -3 BBCOR. | USSSA BBCOR Wood (one-piece) |
| 15U-18U | USSSA 1.15 BPF BBCOR .50 One-piece wood | -3 | not stated | not stated | -3 bats that are BESR, 1.15 BPF or BBCOR. | USSSA BBCOR Wood (one-piece) |
Source: Grand Slam 2026/2027 Rules (linked as "RULES" from grandslamtournaments.com/baseball) · retrieved 2026-10-16
Bat rules follow the age division played in (playing up means swinging that division's bat). Grade-exception players use the bat for their age. USABat is not mentioned.
Pitching rules: ArmRules: Grand Slam Sports Tournaments
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