"He's back to throwing [bullpen sessions] right now," said Farrell.
When will he pitch in another game at Double-A?
"Once there's some repetition to the [bullpen sessions]," Farrell said.
• Prospect Jose Iglesias is starting to broaden his horizons at Triple-A Pawtucket. A shortstop by trade, Iglesias started Tuesday's game at third base.
"You see a guy that's a very capable defender that we want to get exposure to other places in the event that if we do happen to take a look at him being in that utility role at some point this year," said Farrell. "We still view him as an everyday shortstop, but in the interim, we're trying to prepare for the potential of coming and filling that role."
Ian Browne is a reporter for MLB.com. Read his blog, Brownie Points, and follow him on Twitter @IanMBrowne. This story was not subject to the approval of Major League Baseball or its clubs.