But what the hell happened to Greg?

He looked pretty good in the past. He did his pro debut at the 1997 Night Of The Champions, he looked quite good, spilled over and did not place. Then he said that next year he will be in good shape...in '98 he placed 16th at the Ironman...
Then he took 2 years off then came back to the Night Of Champions again in 2001 and did not place again, not even finished the prejudging as I know. And he looked much worse than in the years before.
Then he took 2 years off again and came back at the 2004 Arnold. He was in very good shape and still looked like a nightmare...really-really bad.
Anyway he did the 2005 Toronto Pro too...and he did not place.
What the fuck happened to him? And did he have any sponsors? How he made money? Why he didn't compete more regularly?
I can't understand.