As far as a I know, Kevin Falk started his gay porn career at Randy Blue last 2008.
After a year in porn, Kevin Falk became bigger and bigger in size. I believe his str8 scene at SG4GE is one of the last videos he did for porn.
Looking at his body in the porn site about guys getting thrown pies on their faces and bodies, I would guess that scene happened after he appeared at Randy Blue.
As for str8 porn, I posted before that he already got fucked by a woman with a strap on in Guys Got Fucked. The website says it happened last 2008.
Kevin also did str8 porn, using the name Dave, for Velvet Ecstasy. The image copyright was 2008.
So, Kevin fucked and got fucked by men and women.