Mouton injury could thin Titans' secondary

Posted by ESPN.com's Paul Kuharsky
Bad news from Tennessee: Rookie cornerback Ryan Mouton was carted off the practice field this morning and it's unclear what the extent of the left ankle injury is or how long it will keep him out.

Here's Jim Wyatt's report.

Mouton, a third-rounder out of Hawaii, appeared to rank at the head of the line among four players bidding to be the Titans third corner. He was working behind nickelback Vincent Fuller, a safety, and started in place of the injured Fuller on Saturday night in the team's second preseason. He played in the third quarter outside.

Cornerback depth is one of the few roster issues for Tennessee.

Beyond Mouton, the Titans have veteran DeMarcus Faggins, signed as a free agent from Houston; Cary Williams, a seventh rounder from 2008; and Jason McCourty, a sixth-round rookie out of Rutgers.

The Titans are solid with All Pro Cortland Finnegan and Nick Harper as their starting corners, with Fuller as the nickel.

If Mouton is lost for a long time and none of the three candidates for depth show especially well in the three remaining preseason games, I expect the Titans to comb through corners cut elsewhere to try to bolster their depth in the days leading up to their Sept. 10 opener at Pittsburgh.