Meek, the 28-year-old right-hander seeking to return to his 2010 form following a 2011 season marred by injury, has been erratic in his nine appearances this season. With the move, the Bucs hope regular work will get him back on track quicker.
"We feel he is close," manager Clint Hurdle said following the game. "To get him reps right now [at the Major League level], there are not many leveraged situations available. We do feel this is the best opportunity to get him to finish this process he's been on, to get him to the finish line quicker.
"The biggest part for me is going down and finish his fastball, getting it down in the strike zone. Velocity is not an issue for me. Then he can add the slider to it, and complete the picture."
In those nine outings, Meek has allowed 12 hits and six runs in 9 2/3 innings. He showed his inconsistency in this four-game series. On Friday, he surrendered back-to-back two-run hits. Meek came back on Sunday to throw a shutout inning.
On Tuesday, the Pirates recalled right-hander Jared Hughes from Triple-A Indianapolis.