Oklahoma State's Devin Davis retires from football

At one point Devin Davis looked destined to play on Sundays.

Now, he won't play another down of competitive football.

The former Oklahoma State offensive tackle has retired, reports Bill Haisten of the Tulsa World. Davis suffered a major knee injury before the 2013 season and never could recover from the injury.

“It was emotional for him, but he handled it better than I would have ever handled it,” OSU coach Mike Gundy said.

There was hope Davis would have a similar story as Kye Staley, who suffered a major knee injury during preseason camp in 2009 that forced him to miss the 2009 and 2010 seasons while putting his career in doubt. Staley eventually returned to the team after a two-year hiatus to play a significant role as a bruising blocker and special teams ace for OSU from 2011-13.

Although not unexpected, it's a disappointing end to a promising (and potentially lucrative) career for Davis.