PITTSBURGH -- The Pirates made a series of roster moves before Wednesday's 5-4 win over the D-backs, shuffling their bullpen as they called up two relievers from Triple-A Indianapolis.
Pittsburgh placed struggling reliever Arquimedes Caminero on the 15-day disabled list with a left quadriceps strain, put setup man Tony Watson on the paternity list and recalled right-hander Rob Scahill and lefty Kyle Lobstein to fill out their bullpen.
After a breakthrough season, Caminero hasn't looked right all year, but he reached a nadir in Tuesday night's 12-1 win over the D-backs. The flame-throwing righty hit two of Arizona's batters in the head -- Jean Segura with a 96-mph fastball, and Nick Ahmed with a split-finger fastball.
Caminero was ejected. Afterward, Caminero told head athletic trainer Todd Tomczyk that his left quad had been bothering him.
"He got to a point after [Tuesday] night that he couldn't compete and do the things that he needed to do as a professional pitcher," Tomczyk said. "Therefore it was in his best interest that he takes a pause for competing, we allow this to calm down, allow this body part to heal and build him back up accordingly."
He has allowed 24 hits and 13 walks (plus three hit batters) in 17 1/3 innings while striking out 14. Manager Clint Hurdle did his best to put Caminero in low-leverage situations, hoping the hard thrower would get back on track, but Caminero continued to struggle.
"He's kind of in a cloud right now and doesn't know what's going on," catcher Chris Stewart said Tuesday night. "He's trying to feel things, trying to get that feeling back again where he was consistent like he was last year -- just searching."
Now, Caminero will have at least 15 days -- and likely a full Minor League rehabilitation assignment -- to find his way again.
"We're going to need to keep him off his feet for a few days. With all the sequences of events, that might be good as well to get him down," Hurdle said. "Hit pause for a little bit then go ahead and when that appropriate time comes to rekindle and reignite, then start working again and pitching again, get back right on track."
Watson's wife, Cassie, was expected to give birth to the couple's second child, a boy, Wednesday. Players can remain on the paternity list for one to three days, so Watson should return by this weekend's series in Texas.

In place of Caminero and Watson, the Bucs called on Scahill and Lobstein, both of whom have pitched in the Majors already this season and are capable of throwing multiple innings in relief.
Scahill is in his second stint with the Pirates, having posted a 6.00 ERA in eight games between April 14-26. He had three saves and a 2.89 ERA in nine Triple-A relief appearances.
Lobstein opened the season on the Pirates' roster and posted a 4.79 ERA in nine games. He made one start for Indianapolis and pitched four scoreless innings on Friday.