"I have resigned @OaklawnRacing to pursue opportunities with @santaanitapark and The Stronach Group. Will call SOME of SA winter/spring meet," Mirahmadi tweeted Dec. 8 from his account, @FrankMirahmadi.
Mirahmadi, who replaced Oaklawn's legendary Terry Wallace as track announcer following the 2011 race meet, reportedly will share announcing duties with Michael Wrona at Santa Anita, which begins its 2015-16 meet Dec. 26.
The Santa Anita position became available with the recent announcement that longtime announcer Trevor Denman was retiring.
David Longinotti, Oaklawn's director of racing, said the track is confident it will have a replacement for Mirahmadi before the track begins its meet Jan. 15, 2016.
"Frank Mirahmadi has resigned to pursue other opportunities," Longinotti said in a statement. "We wish him the very best. Oaklawn is among the premiere race meets in the country and we have begun a search to find the most talented race caller available. We have received numerous applications."