David Phelps joins Trenton Thunder for rehab assignment
Additionally, Thunder right-handed starting pitcher Sean Black, a native of Mt. Laurel, NJ, has been placed on the team's disabled list with right elbow soreness (retroactive to 7/19). Outfielder Mikeson Oliberto has been transferred back to Short Season-A Staten Island after playing one game with the squad.
Phelps, 26, has been on the Yankees DL since July 5th with a slight sprain of his right forearm. He has made 18 appearances (12 starts) with New York this season and gone 6-5 with a 5.01 ERA. Phelps spent a large portion of the 2010 season with Trenton and went 6-0 with a 2.04 ERA in the Eastern League.