Trying to verify GU bat
 

I picked this up recently. It is a 33" LS M110 Pro Stock Lite that is autographed. There is a small amount of pine tar above the ring, and the handle is still slightly tacky. The barrel shows heavy use. The unusual feature is the knob has been shaved on opposite sides, one of which has splintered off (which I assume is why it was retired). The player in question has stated that he uses his gamers for BP as well. But from my research, he has used many different models and styles.
Some questions:
What year(s) is this from?
Would the shaving be done at the factory or in the clubhouse? (I have game photos of this player using the shaved knob)
Is this a Spring, Minors, or MLB bat?

I didn't want the player name to steer anyone. Although I didn't crop so well :D

Thanks for any help!

This was used in the minors. They don't usually order bats with the players name so the majority is pro stock. Hard to date without seeing the full bat.

Shaving would be done by the player not the factory.