It was initially reported that Brown would miss at least eight weeks. If he returns for the Chargers' Week 9 matchup against the Kansas City Chiefs, he will have been sidelined for just over 10 weeks after the surgery, which was scheduled for Sunday.
Brown injured the ankle while making a touchdown reception against the Dallas Cowboys on Saturday night. Acee reported Brown may have suffered "slight ligament damage" in addition to the bone break.
Though Brown didn't make a huge impact as a rookie, he was drawing rave reviews this summer, outplaying free-agent acquisition Robert Meachem.
Brown can still be that. But he probably won't get the opportunity until November.
UPDATE: Brown had surgery to repair his left ankle Sunday morning, according to Michael Gehlken of U-T San Diego.
Follow Dan Hanzus on Twitter @danhanzus.