Do the Pirates need to remove Mitch Keller from the starting rotation?

Is this the worst Mitch Keller has been in his career? He has a 7.03 ERA in his last 11 starts. Would Keller be DFAed if he wasn’t making all the money that he is? The guys wonder if Keller should be sent to the bullpen. Crowley says the Pirates should switch Keller and Mlodzinski’s roles.