There's a SABR stat called TAv ("true average," formerly called eqAv or "equivalent average").
In 2011, Drew Butera had the lowest TAv of any batter with more than 250 PA since at least 1950. The worst in sixty years. And his splits show him "better" against lefties (not saying much) so he was really incredibly awful against righties.
It's mentioned here:
http://www.baseballprospectus.com/article.php?articleid=1600
So here's Butera's card in the upcoming set:
v. L : 15.2 OB, 12.8 TB, 0.1 HR, no BPHR, 27 DP (note, as a RH he'll be helped by standard-splits pitching here, when it's on the pitcher's card)
v. R: 9.2 OB, 13.7 TB, no BP singles, 1.3 HR, "w" power, 28 DP
So what do you think? Worst card in 60 years (for those over 250 PA)? Worst, especially against righties?