Roberts, 36, was batting .237 with five home runs and 21 RBI over 91 games this season.
The Yankees opened Thursday at 55-52, three games back in the American League Wild Card race.
Roberts spent his first 13 seasons with the Orioles, earning two American League All-Star appearances, before signing a one-year contract with the Yankees in December.
Brian Roberts will be designated for assignment by the Yankees. — Mark Feinsand (@FeinsandNYDN) July 31, 2014
- Chris Johnson