Antonini was 1-0 with a 4.26 ERA over four games (three starts) for the Isotopes. This is the first Major League promotion for the 26-year-old Antonini, acquired by the Dodgers from the Mets on Dec. 27, 2010, for Chin-lung Hu.
A left-handed starter, Antonini's stay in Los Angeles could be short. Reliever Todd Coffey is eligible to come off the disabled list Sunday. Coffey is scheduled for Minor League rehab innings Wednesday and Friday. If those go without an issue, he's likely to be activated Sunday, with Antonini returning to Albuquerque.
Manager Don Mattingly said the club chose Antonini to counter Atlanta's left-handed hitters.
Antonini said he got the call around 1 a.m. Tuesday morning while the club was in Oklahoma City. He called his mother in Philadelphia and woke her up with the good news.
"I was a little surprised, but I was throwing the ball good there and once you get a rhythm, you never know what can happen," Antonini said.