In a two-inning start for the Class A Advanced Tampa Yankees on Friday, Chamberlain gave up two runs (one earned) on a pair of hits, one walk, one strikeout and one home run. The long ball came from the first batter Chamberlain faced, Dan Grovatt, a New Jersey-born 11th-round pick of the Pirates' from 2010. A Pittsburgh farm team, the Bradenton Marauders won the game, 3-2, and Chamberlain took the loss.
Chamberlain did not give up a run in four innings for the Gulf Coast League Yankees prior to Friday. Yankees manager Joe Girardi did not have a report on Chamberlain's outing when he met with reporters before the Yankees and A's played a 10:05 p.m. ET contest Friday.
Chamberlain has yet to pitch on back-to-back days.
"I don't think that would be the last test," Giradi said Thursday. "Let's let the powers that be make that decision."
Pitchers have 30 days to rehab in the Minors. Chamberlain's first appearance came on July 10.