Delaware Interscholastic Athletic Association (DIAA) · NFHS default
| Division | Allowed certifications | Max drop | Max barrel | Max length | Notes | Find bats |
|---|---|---|---|---|---|---|
| High school (NFHS Rule 1-3-2) | BBCOR .50 One-piece wood | -3 | 2 5/8" | 36" | Non-wood bats need a permanent "BBCOR .50" (or "USA Baseball BBCOR") mark; stickers or decals are not accepted. Weight may not be more than 3 oz less than length. | BBCOR Wood (one-piece) |
Every state association plays high school baseball under NFHS rules. We have not checked this association's own handbook for bat-specific additions, so the NFHS rule is shown.
NFHS source: NFHS Baseball Rules: 1-3-2 Bats · retrieved 2026-10-16. Association: Delaware Interscholastic Athletic Association (DIAA).
Starting January 1, 2028, NFHS will also permit USABat -4, -5 and -6 bats and USA BBCOR bats. Previously certified BBCOR .50 bats stay legal indefinitely (USA Baseball, About USA BBCOR).
Pitch counts: ArmRules: Delaware · Travel and tournament bat rules: all organizations
2 tournament operators found running youth/travel events here (retrieved 2026-10-16). Bat rules link to each operator's BatRules page; blank means none was published that we could find.
| Operator | Events seen | Bat rules | Pitching rules |
|---|---|---|---|
| USSSA Baseball (state directors) debaseball.usssa.com | USSSA state tournaments, state championships and the National All-State qualifier path | USSSA Baseball | ArmRules |
| Perfect Game (PG) tournaments www.perfectgame.org/schedule/Default.aspx?Type=Tournaments | 2026 PG Delaware Fall Select Championship; 2026 PG Delaware Fall Elite Championship | Perfect Game (youth events) | ArmRules |
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