EL SEGUNDO, Calif. -- Los Angeles Chargers left tackle Joe Alt will undergo season-ending surgery for the high right ankle injury he suffered in the team's win over the Tennessee Titans , a team spokesperson said Monday.

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

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

"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

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