Yanks will face Mazzaro, not Chen, on Wed.

The Yankees will face right-handed pitcher Vin Mazzaro, not left-hander Bruce Chen, on Wednesday night in the Bronx.

The Royals announced before Tuesday night's game that Chen will be placed on the 15-day disabled list before Wednesday's game, retroactive to May 6, with a left lat strain. Mazzaro will be called up from Triple-A Omaha.

The 24-year-old Mazzaro, from Hackensack, N.J., has made 41 major league appearances, 35 of them starts, in 2009 and 2010 with the Oakland A's. He is 10-17 with a 4.72 ERA. He was acquired by the Royals in November along with pitcher Justin Marks, in exchange for outfielder David DeJesus. Mazzaro was 1-0 with a 4.97 ERA in five starts for Omaha this season.

Chen is 4-1 with a 3.59 ERA in seven starts this season for the Royals.