AJ McCarron squares off with ‘legendary coach’ again in UFL

Birmingham Stallions coach AJ McCarron and Houston Gamblers coach Kevin Sumlin will be on opposite sides of the field for a United Football League game on Sunday. It won’t be the first time they’ve squared off.

But the other times, McCarron was on the field.

In two games as Alabama’s quarterback against Sumlin’s Texas A&M Aggies, McCarron completed 41-of-63 passes for 643 yards with…