PITTSBURGH -- The Pirates made a series of roster moves prior to Saturday night's game with Tampa Bay to bolster their pitching staff, which has starters Ian Snell and Phil Dumatrait on the disabled list.

The Bucs placed right-hander Franquelis Osoria on the 15-day disabled list. Osoria has been bothered by bursitis in his right ankle. Pittsburgh also optioned outfielder Nyjer Morgan to Triple-A Indianapolis and recalled right-hander T.J. Beam, who was just sent down, right-hander John Van Benschoten and Saturday's starter Ty Taubenheim.

Newly acquired right-hander Denny Bautista was listed as day-to-day after being hit with a line drive on his right forearm on Friday night. His injury was described as a right forearm contusion.

Van Benschoten was in the bullpen for Saturday's game with the Rays, but said he was told before he left Triple-A that he would start on Wednesday. Pirates manager John Russell would not commit to that scenario.

"We have to get through the next couple days before we start getting too far ahead of ourselves," Russell said. "With the short start on Friday night and starting pitchers going down within a couple days -- Osoria with the bad ankle and Bautista getting hit with a line drive in the forearm -- we've got to have some options for the next couple days. Then we'll see where we go next week, but right now we needed to get some guys in our bullpen to pitch and to give us some innings for the next couple of days."

Beam joined Triple-A Indianapolis in Columbus, Ohio, for Friday night's game and he and Van Benschoten drove over to Pittsburgh on Saturday.

"I drove to Columbus with my wife and my kid," Beam said. "I found out at midnight that I was coming back and I turned around and drove right back with Van Benschoten early in the morning. Hopefully, I get another shot and I pitch a little better than I did the last five days. It's just a matter of me getting acclimated to my surroundings and getting used to being here, and hopefully I'm here a little bit longer this time."

Morgan, who was batting .143 in limited duty as a reserve outfielder, took the demotion to Triple-A in stride.

"It's a business," Morgan said. "I can go down there and work on some stuff and get my at-bats. When the opportunity comes again, I can come up and do what I have to do."