As for Mazzaro, his addition provides the Pirates much-needed length out of the bullpen Tuesday night after Monday's starter, James McDonald, lasted just 1 2/3 innings before placing the remaining 7 1/3 innings on the 'pen.
Mazzaro, acquired from the Royals in an offseason trade, went 1-0 and allowed just three hits over seven shutout innings in three relief appearances this season with Indianapolis. The 26-year-old split last season between Triple-A Oklahoma City and Kansas City, bouncing back and forth from the bullpen to the rotation.
"I felt I was throwing the ball pretty well," Mazzaro said. "It's probably one of the best springs I've had, and it's the first time throwing out of the bullpen, too, so I felt good, and the recovery was good and all that."
In 18 appearances (six starts) with the Royals in 2012, Mazzaro went 4-3 with a 5.73 ERA. For his career, the right-hander is 15-21 with a 5.22 ERA in 66 big league appearances (45 starts).
Mazzaro says he is ready for whatever the Pirates need him to do.
"I was going from one, to two, to three or four innings," Mazzaro said. "It was kind of back and forth, whatever they really needed. I don't know what they need here -- long man, starter, one- or two-inning guy, it doesn't really matter right now. I'll just go out there and give them hell and try and help the team out."
Paul Casella is a reporter for MLB.com. Follow him on Twitter @paul_casella. This story was not subject to the approval of Major League Baseball or its clubs.