American Legion bat rules (2027)
American Legion Baseball bat rules.
| Division | Season | Stamp | Barrel | Max length | Drop limit |
|---|---|---|---|---|---|
| Junior (17U) Ages 13–17 | Current | BBCOR or Wood | 2 5/8" | 36" | -3 or heavier |
| Senior (19U) Ages 15–19 | Current | BBCOR or Wood | 2 5/8" | 36" | -3 or heavier |
Notes by division
- Junior (17U): Non-wood: 36" and 2 5/8" max with the BBCOR mark on the barrel. Wood: 42" and 2 3/4" max. An illegal bat gets the player and manager ejected. Legion votes on rule changes in odd years, so watch the 2027 book.
- Senior (19U): Same bat rule as Junior Legion. Wood: 42" and 2 3/4" max.
Stamps used in American Legion
- BBCOR .50 mark: The high school and college standard: -3 drop, barrel up to 2 5/8", 36" max. BBCOR bats made before USA BBCOR stay legal in high school indefinitely, but the NCAA requires the new USA BBCOR mark from Jan 1, 2029. Official list.
- one-piece solid wood: One-piece solid wood is legal almost everywhere without a stamp. Multi-piece, laminated, bamboo and composite-wood bats usually do need a certification mark.
Sources
- https://www.legion.org/getmedia/f339efc5-785d-46d3-8dd6-5877884d1736/39ACY1225-Baseball-Rule-Book-Junior.pdf (checked Oct 23, 2026)
- https://www.legion.org/getmedia/7d390fd4-650e-4e60-b534-85681100c2c0/39ACY1225-Baseball-Rule-Book-Senior.pdf (checked Oct 23, 2026)
This page summarizes published rules. Your league or tournament can add its own, and its ruling is final. Confirm your bat isn't on a decertified or non-approved list before you buy. Questions about a specific model? Check the official list linked above. More bat questions.
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