What are the tells that a team is using re-engineered bats?

[inumpire]

Failing compression can also have nothing to do with altered bats. Lots of slowpitch bats test so close to the line,
they fail in no time.

It also depends on who is doing the testing.

 

[CoreSoftball20]

It also depends on who is doing the testing.

Competence of testers is another topic...hahaha

 

[_MIA_]

Best way

 

[The Man In Blue]

With the thousands of hours of intensive training umpires are provided with each year, the doctorate-level courses in chemistry and engineering that are required of umpires, and the ... Oh yeah. I guess I just paid them somewhere between $40 and $75, so that qualifies me.

Heck if I know.

 

[warbird]

If they are using two bats and their coaches are arrogant, ask the umpires to check the bats. It will make the game more fun.