For those that watched "After The Catch" who saw Capt. Andy Hillstrand wearing a Marine shirt, here's the reason why:
While not a Marine, Capt. Andy was at a NASCAR event in Charlotte, NC where he met a group of wounded servicemen (Andy is pro-military and has a lot of respect for those who serve). One of the men in the group was a Marine who had been seriously injured while serving and they spent quite a bit of time talking and hanging out at the race. He was wearing that particular shirt and Andy was in a Time Bandit shirt so they decided to swap shirts as a sign of mutual respect and admiration.
Andy wore the shirt for "ATC" as a shout out to the Marine who gave it to him and, in essence, a shout out for all those who give so much for this country.