Luis Castillo has been far more successful against right handed batters for strikeouts, not just this season but in previous years as well. The slider bumps up to a 40% whiff rate against righties and that's where he should be going for strikeouts again tonight. Over the last month, this Rockies team is striking out more than 26% of the time vs. righties and they should have at least seven right handed bats in the lineup. I'm finding some value at this price to back Castillo for a 7th strikeout and at the very least, he's a significant favorite to complete six innings, so if he does that we need him to just be 1 strikeout better than a K per inning.