Anderson, an All-Pro who rushed for 1,846 yards last season, tore the anterior cruciate ligament in his right knee during a loss to the Dallas Cowboys on Sept. 20.
The surgery was performed at Piedmont Hospital about two weeks after the injury, allowing time for a reduction in swelling.
Similar injuries have taken from nine months to a year to heal. Anderson has almost 10 months to fully recover for the 2000 training camp.
The surgery was performed a day after Denver's Terrell Davis learned he also had sustained a season-ending knee injury. Davis was the only runner to gain more yards than Anderson last season, becoming the fourth back in NFL history to eclipse 2,000 yards.
Denver beat Atlanta in the Super Bowl.
The Falcons (0-4) play at New Orleans on Sunday.
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