Washington Interscholastic Activities Association (WIAA) · state document checked
| 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) |
| Middle school (WIAA 32.67.1) | BBCOR .50 USABat (USA Baseball mark) USSSA 1.15 BPF | not stated | not stated | not stated | Any bat with a BBCOR, USA or USSSA certification mark is legal at the middle level. | BBCOR USA Baseball USSSA |
WIAA handbook 32.67.1: at the middle-school level, any bat with a BBCOR, USA or USSSA mark is legal. High school follows NFHS.
NFHS source: NFHS Baseball Rules: 1-3-2 Bats · retrieved 2026-10-16. State document: WIAA 2026-2027 Handbook, 32.6.0 and 32.65.0.
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: Washington · Travel and tournament bat rules: all organizations
6 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) wabaseball.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 | Harvest Slugfest; Spooky Season Slugfest; PNW Fall State Championships | Perfect Game (youth events) | ArmRules |
| Triple Crown Sports baseball www.triplecrownbaseball.com/states/washington | state events, e.g. Wenatchee Valley Season Opener | Triple Crown Sports baseball | ArmRules |
| Top Tier Sports toptiersports.net | Western WA, Eastern WA Bullpen Series, Columbia River (Vancouver) | Top Tier Sports (WA tournaments) | ArmRules |
| GSL Tournaments (Premier Sports Tournaments) gsltournaments.com | Seattle/Tacoma area and Eastern WA | GSL Tournaments (Premier Sports Tournaments) | ArmRules |
| NW Nations Tournament Baseball nwyouthbaseball.com/2026-nwn-tournaments | Vancouver and Kennewick/Tri-Cities events (e.g. Kennewick Kickoff) | NW Nations Tournament Baseball | ArmRules |
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