The Boston start? LeBlanc left with men on second and third. Castro gave up a single allowing two to score to the next batter. He got a groundout to end the inning. The next inning, he faced one batter and got a long fly out. He may have been a little wild, but that doesn’t sound like a terrible outing.
We're going on small sample sizes here, especially in regards to Sulser seeing as Armstrong was here last year and we've had Castro for a bit. I like what I've seen from him, I'm just not ready to anoint him as a key bullpen piece based on what he's done so far.
IMO, Castro has the best raw potential, Armstrong is the best overall pitcher with the jury still out on Sulser.