No, translation: Donnie Joseph improved his control. Joseph had a 70-80 slider and has for a while. But until he was able to throw it for strikes, it didn't matter much against advanced competition.
BTW, you see what happened to Chapman when he stopped throwing his slider? He got rocked. A great fastball only goes so far. Need to keep guys honest. 95% of starting pitchers need 3 pitches to do that. Right now, Cingrani needs more out of his 3 pitches.