Coulombe threw two-thirds of an inning Wednesday for Oklahoma City, allowing three hits and two earned runs. Coulombe appeared in a pair of games so far this season for Los Angeles, most recently on June 4. Overall he has an 8.10 ERA in 3 1/3 innings in four stints this season in the Majors.
Dodgers manager Don Mattingly said that Coulombe would have been available to pitch Thursday, despite throwing 24 pitches Wednesday. Coulombe will add pitching depth for the Dodgers, who used a six-man bullpen Wednesday night, after right-hander Chris Hatcher went to the 15-day disabled list with a strained left oblique.
Heisey earned the start in center field Wednesday night, but is hitting .154 in 26 at-bats this season. Los Angeles suddenly has an excess of depth in the outfield since Yasiel Puig returned from injury on June 6 and Scott Van Slyke was activated Wednesday.
Heisey, who has more than five years of service time, will have to accept the option.
"I'm not sure of the paperwork side of it, but we optioned him," Mattingly said.
• Darwin Barney accepted his designation to Triple-A Oklahoma City and started at second base Thursday night. Barney was designated for assignment on June 12.
• Moving his rehab assignment from Class A Advanced Rancho Cucamonga to Triple-A Oklahoma City, reliever Joel Peralta pitched around a throwing error by shortstop Corey Seager for a scoreless inning Thursday night. Peralta is recovering from a pinched neck nerve.
Steve Bourbon is an associate reporter for MLB.com.