New York Giants center Shaun O'Hara has a Lisfranc sprain of his right foot, reports Ralph Vacchiano of the New York Daily News.

Head coach Tom Coughlin had declined to classify it as such, but Vacchiano has confirmed the diagnosis, which will sideline the veteran center for at least this Sunday's game against the Seattle Seahawks.

Adam Koets, a sixth-round pick (189th overall) out of Oregon State in 2007, will likely start for O'Hara. The 6-5, 300-pound Koets started four games earlier this season while O'Hara was out with a left foot injury.