Minnesota State linebacker in critical condition after alleged assault by ex-Gophers' QB

Minnesota State University, Mankato head football coach Todd Hoffner lights a candle held by former team member Sam Thompson, who said a few words at a candle light vigil held for former Minnesota State, Mankato, linebacker Isaac Dallas Kolstad, Sunday, May 11, 2014, in Mankato, Minn. Former Minnesota Gophers quarterback Philip Robert Nelson was jailed following an altercation in Mankato early Sunday that sent Kolstad to the hospital in critical condition. (AP Photo/The Mankato Free Press, John Cross) (The Associated Press)

FILE - In this Oct. 19, 2013, file photo, Minnesota quarterback Philip Nelson looks to a throw during the first half of an NCAA college football game against Northwestern in Evanston, Ill. Former Minnesota Gophers quarterback Nelson was jailed following an altercation in Mankato early Sunday, May 11, 2014, that sent a former Minnesota State, Mankato, linebacker to the hospital in critical condition. (AP Photo/Nam Y. Huh, File) (The Associated Press)

MANKATO, Minn. – A former Minnesota State linebacker is hospitalized in critical condition after an alleged assault involving former Minnesota Gophers quarterback Philip Nelson.

The Mayo Clinic says Isaac Dallas Kolstad, of Mankato, is in critical condition Monday.

Nelson was jailed after police said officers came across the 24-year-old Kolstad while patrolling around 2 a.m. Sunday. The 20-year-old Nelson was arrested at the scene.

A candlelight vigil for Kolstad was held at Minnesota State University in Mankato on Sunday night.

Nelson left the Gophers in January to transfer to Rutgers, which is moving to the Big Ten next season.