I could be wrong, but i thought Dan O. was always ahead of Stanton on the depth chart during his time in Detroit. Dan replaced Kitna (I think) half way thru the 0-16 season while Stanton continued to hold a clip board. A friend of mine from HS lives in Detroit, and is buddies w/ Stanton. He had good things to say about Dan (seemed like he and Stanton got along pretty well), but my friend was always frustrated that Stanton never got a 'fair shot' while Dan was there (sound familiar).
Listen, I hope Dan makes the most out of the rest of his career in the NFL, and would love to see him starting the remainder if it, but to say he hasn't had a fair shot is not true. Put another way, if he had played his college ball at Rutgers or BCU, and you looked at his opportunities, would you be saying he didn't get a fair shot?