Perez (knee tendinitis) to go on DL

NEW YORK -- Mets left-hander Oliver Perez will be going on the disabled list because of tendinitis in his right knee.

Perez returned to the Mets as a free agent for a $36 million, three-year contract but then was dropped from the rotation after going 1-2 with a 9.97 ERA in five starts. He had an MRI on Wednesday that revealed patellar tendinitis, which causes pain in the kneecap.

Mets general manager Omar Minaya said Perez will be put on the 15-day disabled list Thursday, a move retroactive to May 3.

Left-hander Jonathon Niese will be recalled from Triple-A Buffalo to start Friday against the Pittsburgh Pirates.