Votto and Winker are playing against Ryu today. Why?

Winker has .105 Avg .333 OPS against lefties. Votto is .179 and .503. Farmer is hitting .296 and 1.049 OPS. Ervin 2/3 against lefties while hitless against righties. (Small Sample)

Against righties Winker has .250 Average and .850 OPS. (all 10 homers are against righties).

For a team that has trouble scoring runs, playing Winker and Votto against lefties is just giving away outs.