The retail 'Players' model of Kook bats will be based on performance AND cosmtics. Therefore the shop or retail models will need to look good and perform.
But I suspect that if this guy is sponsored, it is less important whether the bat has 12 equally spaced and perfect grains as the bat will be based mainly on pure performance, and possibly balance, pickup, feel!! In my opinion, I would always pick performance over cosmetics any day of the week!! It sounds as though it isn't a bad looking bat, just not quite perfect to look at!
Tap it up and see how it feels!

If you know this guy is definitely a sponsored player and you trust him, then he should have a very decent bat there.