Locker (wrist) was listed as a non-participant at practice Thursday, the Tennessean's John Glennon reports. Glennon adds that coach Ken Whisenhunt noted that Locker is progressing, with the coach further suggesting that Saturday will likely be a determining day with regard to the QB's Week 4 status. The situation is thus trending toward a possible game-time decision, with Charlie Whitehurst in line to draw the start at QB Sunday against the Colts in the event that Locker is forced to sit.