San Jose State senior wide receiver Noel Grigsby said Thursday that he has a torn meniscus in his left knee.
The recovery time from that injury is three to four months, which leaves open the possibility of a late December return if the Spartans make a bowl game.
"I'm trying to do everything I can to possibly come back before the season is over," said Grigsby, speaking for the first time publicly since the injury.
San Jose State (3-3, 2-1 Mountain West) had previously only disclosed that Grigsby was "out indefinitely" with a knee injury. He had surgery Sept. 24.
Grigsby knew of the injury before the Sept. 7 game at Stanford but tried to play through it. He had six catches for 55 yards and a touchdown in that loss.
"I gave everything I had until they told me the only option was to get surgery," said Grigsby, who's not eligible for a medical redshirt.
He's San Jose State's all-time leader with 237 catches and 3,121 yards.
Tickets for the Earthquakes' first home playoff game -- if they make the postseason -- will go on sale Friday at 10 a.m. with a Visa special offering at www.sjearthquakes.com. Season ticket-holders have Game 1 included in their package. General public sales will start Monday at 10 a.m. at www.sjearthquakes.com or by calling 1-800-225-2277.
Staff writer Elliott Almond contributed to this report.