Which fantasy pitcher to drop?

I am in a rotisserie league. I have 4 relievers and 6 starters. I know I don't need that many starters and only having 4 relievers would be why my saves are struggling. I'm looking to drop a started for a reliever. My starters are Jhoulys Chacin, Clayton Kershaw, Tommy Hanson, Aaron Harang, Alexi Ogando, and Justin Masterson. Who is the best one/two guys to drop?