De La Rosa, who was acquired from the Dodgers in last August’s blockbuster trade, has worked exclusively as a starter in Triple-A, but will be available out of the bullpen on Friday night.
De La Rosa has gone 0-1 with a 3.29 ERA in 11 starts with Pawtucket this year, with most of his starts ending early due to a limited workload for the 24-year-old. He underwent Tommy John surgery in 2011, and Boston has him on a innings limit given that he has never thrown more than 111 innings in his young career.
In his last outing on June 8, De La Rosa went five innings against Syracuse, allowing just one run off four hits while walking four and striking out one.
In 14 career major league appearances with the Los Angeles Dodgers from 2011-12, De La Rosa is 4-5 with a 3.96 ERA and 60 strikeouts.
To make room for De La Rosa, Alex Wilson was sent back to Triple-A. Wilson pitched well Thursday night despite suffering the loss, giving Boston 2.2 innings of work and allowing just one run — the game-winner.
De La Rosa will likely be sent back down over the next day or two, but this will give him a chance to get his feet wet with Boston, and give the Red Sox a fresh arm if they need it out of the pen.