Adam injured Bale with a challenge during the 0-0 draw between the two sides at the M&T Bank stadium, home of NFL franchise the Baltimore Ravens. In May 2011 the Scotland international also injured Bale in a tackle, causing ankle ligament damage which meant the Wales international was out for three months.
In quotes reported by several national newspapers, Bale said: "He's a bit of a coward. What he did was over the top. Some people are like that and it's just wrong."
He added: "It's flattering when players try to take you out in a game but, when it threatens your career, it becomes more serious than that."
Adam was playing for Blackpool when he made the original challenge.
Bale added: "There are pictures on the internet of what he did before when he snapped all my ankle ligaments.
"I was out for three months that time. He's come for me twice now - and he's got me twice.
"When someone makes a very bad tackle on you, you expect an apology. I've had no apology. And I'm not going to accept his apology."
- Baltimore Ravens