A strong case can be made that it hasn't been worse either. (only looking at starts here) Gallardo - 2.97 FIP, 3.46 xFIP, 2.56 ERA Parra - 1.77 FIP, 3.63 xFIP, 4.37 ERA Narveson - 4.19 FIP, 4.25 xFIP, 4.87 ERA Davis - 4.67 FIP, 4.50 xFIP, 7.56 ERA Bush - 5.14 FIP, 5.24 xFIP, 4.56 ERA Wolf - 6.04 FIP, 5.39 xFIP, 4.92 ERA Since Wolf obviously isn't going to be removed I'd say Bush has been the weakest on the year though he has been a bit better the last few starts. I think the only terrible choice here would be to remove Parra from the rotation. There really isn't a good or right choice with the rest of them. Narveson and Parra both kind of forced their way into the picture and now it is just kind of murky.