His in - zone swing rate pointed closer to league - average starters .
The in - zone contact matched a pool of pitchers a few percentage points worse than league average , closer to Bolsinger 's FIP .
Bolsinger 's in - zone swing rate pointed closer to league - average starters .
The in - zone contact matched a pool of pitchers a few percentage points worse than league average , closer to Bolsinger 's FIP .