Daryl Knowles 73?

He's rated an E balance on card...isn't he clearly stronger against Lefties?

Well, he walks a lot more guys against RHP, but his AVG against RH is a good bit lower than against LH batters. SLG against him is similar, though he gives up HRs to RH batters and 2b/3b to LH batters. I think he's better against LH batters than RH batters for our purposes, but not appreciably so.