Fake Credits?

I was looking at The Descent movies and noting to myself that no one that played a Crawler in the 1st movie returned to play one in the 2nd movie, but then noticed an uncredited actor that claimed to play a crawler on both, looking at his page, it seemed odd that an American bit part player went to Scotland to play a role twice 4 years apart and be the only person playing a crawler not to be credited. Then I saw all his parts were uncredited, his bio claims he insists on such despite being in high demand. Lots of questionable credits on major films, his page was created in 2010 but his credits stretch back to 'Jaws' in 1975.

I can find no evidence of anything about him online. his whole page seems questionable.

One example is 'The Breakfast Club', it's easy to account for every part in the movie, it's virtually a bottle movie with no extras at all, so who's 'Luke'?!

I know his family details are all real but that's all i can find that's legit.

Anyone got anything to verify anything else from this guy?