Danario Alexander devoted months to knee rehab, working to return from an August injury as soon as possible.

It won't happen as soon as first hoped.

The Chargers wide receiver recently underwent additional surgery to repair the right knee injury that ended his 2013 season, sources said. The revision ACL surgery, performed in January as a follow-up to the primary reconstruction done in August, delays the original timetable for the impending free agent's return to football activities.

It doesn't look likely that Alexander will be healthy to start the 2014 season. It's a shame too -- he and Keenan Allen would have made a dangerous duo for the Chargers. He was outstanding down the stretch in 2012.

The Tennessee Titans have hired San Diego Chargers offensive coordinator Ken Whisenhunt as their new head coach.

Whisenhunt replaces Mike Munchak, who parted with the team after three seasons and a 22-26 record.

Whisenhunt led a revitalized Chargers offense led by QB Philip Rivers, RB Ryan Mathews and WR Keenan Allen. His first order of business will decide who is the future at QB. Jake Locker has been inconsistent, but the Titans hold the #11 pick. Ryan Fitzpatrick could hold down the fort for a year if necessary.

Keenan Allen is active, as expected.

Chargers WR Keenan Allen (shoulder, probable) took full practice reps all week and is probable for Week 16. Allen is ready to go for a nice matchup with the Raiders.

Chargers WR Keenan Allen (shoulder) took full practice reps again Thursday. Allen will be good to go for a great matchup with the Raiders.

Chargers WR Keenan Allen (shoulder, probable) practiced fully Wednesday. Allen will be fine for a nice matchup against the Broncos.

Keenan Allen (shoulder) practicing today, as expected.

Allen appears to be good to go for Thursday night against the Broncos, who rank 31st in allowing fantasy points to WRs. Allen should be a good play when our rankings come out Wednesday.

Chargers wide receiver Keenan Allen exited the game Sunday with a first-quarter shoulder sprain suffered while shielding himelf from collision. Despite the interruption, he still padded his résumé for NFL Offensive Rookie of the Year, totaling three catches for 59 yards and two touchdowns in a 37-14 win.

It was the first multi-touchdown game of his career.

After going to the locker room for further evaluation, Allen received a shot and returned in the second quarter. In his first drive back, he caught a 4-yard touchdown on a corner route against blown coverage. Allen looks like he'll be a go next week against the Broncos on a short week. After that, in Week 16, he gets the Raiders - two pretty favorable matchups in the future.

Chargers WR Keenan Allen (knee, probable) took full practice reps all week and is probable for Week 12. Allen will be good to go to face the Chiefs. It's not a great matchup and his knee is a bit of a concern, so he's not quite as solid of a start as usual.

Chargers WR Vincent Brown (shoulder, probable) took full practice reps on Friday after being limited earlier in the week and is probable for Week 12. Brown should play but isn't much of a fantasy option at this point, even with Keenan Allen nursing a knee injury.