A look at Colts' offensive line depth

INDIANAPOLIS -- The Indianapolis Colts possibly acquired their starting center Thursday when they signed Phil Costa, formerly of the Dallas Cowboys.

There’s plenty of time left in the offseason for the Colts to add another center to the roster if they choose to.

But for the sake of pure entertainment – and to further make some fans upset over the Costa signing – let’s take a look at the offensive line as if the Colts would be playing a game this Sunday afternoon.

Center: Costa, Khaled Holmes, Thomas Austin

Guard: Donald Thomas, Hugh Thornton, Zach Allen, Joe Reitz

Tackle: Anthony Castonzo, Gosder Cherilus, Xavier Nixon

Costa, Thomas, Thornton, Castonzo and Cherilus would be the likely starters. That group should be able to do an adequate job – at least better than last season’s group – of protecting quarterback Andrew Luck and blocking for the running backs.

I’m not sold that those will be the only three centers the Colts look at. It’s not in general manager Ryan Grigson’s blood to sit still and not look to make more moves. It likely won’t be Alex Mack, but don’t be surprised if there’s another center on the roster before the start of training camp.