One of the downsides of being a fan of one baseball team is you can get a skewed view of how good an opposing player is, simply because of small sample sizes. Ask a fan of the Dodgers, and they will probably tell you Kole Calhoun is a great hitter. He’s not, of course — his career OPS is 102, which is barely above average overall and downright lousy for a right-fielder. But his tOPS+ against the Dodgers is 150, which means he has hit 50% better against Los Angeles than he has overall.
We also remember the damage guys do against our team more than the times they’ve failed.