The right-hander, who was the team's top setup man last season, has thrown 4 2/3 innings in four games for Salt Lake, allowing two earned runs, striking out three and walking three, but he hasn't pitched since last Friday.
"He's not quite where he needs to be," said Scioscia, who added that he wanted to wait until he heard from the medical staff before discussing the nature or severity of the setback. "Maybe it's a matter of catching his breath. Hopefully, he'll pick it up again. We'll see what the next step is."
De La Rosa suffered the forearm strain in early March and missed most of