Jimbo Fisher hired Bobby Petrino to run the offense, and presumably call the plays. But on Monday, his commitment to that structure was wavering at best. Texas A&M Aggies coach Jimbo Fisher made what was seemingly a big change this offseason, firing offensive coordinator Darrell Dickey, and replacing him with former Arkansas head coach Bobby Petrino. Fisher, of course, has been the one in charge of play calling for the Aggies since his hiring, and in recent years, has been criticized for the offense’s lack of production. And it was assumed that Petrino, being well known for his offensive acumen,…