I've not seen this posted anywhere officially or unofficially but I was on the Mustangs page and see that Pat Kelly is listed as Manager, down from Advanced A. He's probably grateful he didn't have to go to Bakersfield.
Also, Eli Marrero is listed as the Hitting Coach for Billings. I am assuming this is the ex Cardinals catcher.
Bob Forsch is the only holdover from past years as Pitching Coach.