Spring position preview: Position battles open up on OSU's offensive line

A starter at left guard the last two seasons, junior Marcus Keyes is the most experienced player on the Cowboys' offensive line entering spring practice. [PHOTO BY NATE BILLINGS, THE OKLAHOMAN]STILLWATER — Aside from quarterback, you won't find a position group at Oklahoma State that opens spring practice with as much uncertainty as the offensive line.

Both the depth and the talent are improving, but with three seniors graduating off last year's front, and a fourth player's future in limbo, the position battles should be intense.

Oklahoma State kicks off spring football practice Tuesday. Until then, The Oklahoman will break down each position group, based on who will participate in spring…