Quote
droopy
Shelton weighs only 299. Not an ideal weight for a guard on a team that couldn't run the ball in the postseason.

Actually, many consider Shelton a good run blocking OL.

[ramblinfan.com]

Note that this is a dated article, but the point stands.

This is but one article, there are several others by different authors.

Is it possible that the 299 pound weight you referenced is inaccurate?