Porterie tears ACL, MCL will miss rest of New Mexico season

New Mexico quarterback Donovan Porterie will miss the rest of the season after tearing his right anterior cruciate ligament and medial collateral ligament in the first half of Saturday's 56-14 loss to Tulsa.

Porterie was injured after a low hit during a pass rush with less than 4 minutes remaining in the first half. To that point, Porterie had completed 11 of 13 passes for 92 yards with one interception.

Freshman Brad Gruner replaced Porterie and completed seven of his 12 passes for 98 yards and a touchdown. But he also threw three interceptions. This is the second time this season that Gruner has had to replace Porterie because of injury.

Gruner also replaced Porterie after he suffered a neck injury against TCU in the first game of the season. Gruner completed three of 14 passes for 93 yards and an interception in that game.

Porterie, a junior, has already used his redshirt season and can't apply for a medical redshirt until after his senior year. However, Porterie already has played in more than the allowed 20 percent of games this season for medical hardship eligibility.

New Mexico is 1-3 this season with its only win coming against Arizona last weekend. The Lobos are the only Mountain West team to have at least six wins and gain bowl eligibility each of the last seven seasons.

Graham Watson covers college football for ESPN.com.