Colvin: 3.2 BB%, 28.7 K%, 15.8 HR/FB% Stewart: 10.1 BB%, 19.0 K%, 13.3 HR/FB% Stewart is playing much better than Colvin even before you factor in defensive value. The only reason Colvin's numbers look even superficially better is his completely and utterly unsustainable .393 BABIP (compared to Stewart's .217 figure). This trade didn't look bad to begin with, and it's looking better since the start of this season. It only looks worse if you aren't paying attention.