Plenty to prove

Keep a close eye on Kyle Kosier as training camp gets underway ... for a number reasons.

Guard Kyle Kosier is perhaps the Cowboys most underrated and underappreciated player in recent years.

A couple of years ago, on a line that also included Colombo and Flozell Adams at tackle, Andre Gurode at center and Leonard Davis at right guard, Kosier had the lowest salary and the least name recognition … but it was during Kosier's absence from the lineup that the line struggled the most.

Kosier is one of the NFL's most intelligent blockers, stronger than many realize and an elite technician. The downside, however, is that like Colombo, Kosier has shown signs in recent years of wearing down (missing 18 games over the last three seasons). In his case, however, that might not matter, as the only proven veteran on the roster who could replace him is Montrae Holland, whom the coaching staff likes as a versatile backup who can play both guard positions, and even center in an emergency.

Like Colombo, Kosier is helped by the lack of proven younger backups, where Holland is joined by the likes of Phil Costa, Travis Bright and 2011 draftee David Arkin. Odds are good that Kosier will be back, and if he can stay healthy, the Dallas line and offense will be better for it.

If not, things could change ... quickly.

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