Chargers LT Joe Alt to undergo season-ending ankle surgery - ESPN

EL SEGUNDO, Calif. — Los Angeles Chargers left tackle Joe Alt will undergo season-ending ankle surgery, for the high right ankle sprain he sustained in the Chargers win over the Tennessee Titans, according to a team spokesperson.

The injury came in the second quarter, when Titans defensive tackle Sebastian Joseph-Day fell into Alt's right ankle.

It's the second high ankle sprain Alt has had this season. He exited the first quarter of the team's Week 4 loss to the New York Giants on a medical cart and missed the next three games with the same injury.

«I feel bad for Joe,» coach Jim Harbaugh said, «but I know it's going to be OK.»

Throughout the offseason, the Chargers boasted about having the league's best tackle duo — with Alt and Pro Bowl tackle Rashawn Slater. Now the Chargers will have to play this season without both, and the injuries to the offensive line don't stop there.

Slater suffered a season-ending patellar tendon rupture in his left knee in training camp. Right guard Mekhi Becton, the team's top free agent offseason signing, has been in and out of the lineup with injuries throughout the year and missed Sunday's win with a knee injury.

Right tackle Bobby Hart also got injured Sunday, leaving the game in the first quarter after Titans outside linebacker Dre'Mont Jones fell into his left knee. The team said that Hart has a groin and ankle injury. Harbaugh said he didn't think Hart would land on injured reserve.

Without Alt, the Chargers have been a completely different team — struggling to run the ball and defenses constantly putting quarterback Justin Herbert under duress.

The Chargers are 4-0 this season when Alt plays the entire game and 2-3 when he doesn't. Herbert has a QBR of 80 with Alt on the field and a