Seems like he used Jojo enough this week, he got tagged once too. But he could yet be this year's Seranthony (after not having one last year).
I'm assuming Phelps is just having a bad week, which, in this season, feels like a bad month. Perhaps the trade messed up his routine physically - he spent two days driving here from Milwaukee, that would make anyone rusty... or perhaps even susceptible to injury.
Workman just wasn't having a very good season even before he got here, but was still an upgrade over what we had, and over Neris if he'd continued struggling. Hembree is really just filler, more like Nicasio last year except w/o the paycheck fortunately.