How do I check whether a bat is legal?

Q: How do I check whether a bat is legal?

For Majors: Non-wood and laminated bats must carry the USA Baseball logo, which shows they meet the USABat standard. The barrel can be no more than 2⅝ inches in diameter. Bats marked BPF 1.15 (the old standard) are not allowed. Check every player's bat at the start of the season, and any new bat when it turns up. An illegal bat can cost your team outs.

Question

Accepted Answer

For Majors:

Non-wood and laminated bats must carry the USA Baseball logo, which shows they meet the USABat standard.
The barrel can be no more than 2⅝ inches in diameter.
Bats marked BPF 1.15 (the old standard) are not allowed.

Check every player's bat at the start of the season, and any new bat when it turns up. An illegal bat can cost your team outs.