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MANKATO, Minn. - They were two young Mankato natives, both who displayed prowess on the college football field.

There was Philip Nelson, a 20-year-old quarterback who recently transferred after playing two seasons at the University of Minnesota. The other, Isaac Kolstad, is a 24-year-old married father who recently played linebacker for MSU-Mankato.

It's unclear what happened early Sunday morning that led to an alleged altercation that landed Nelson in police custody, and put Kolstad in critical condition at the Mayo Clinic Health System in Mankato.

Kolstad was found unconscious outside of a bar in downtown Mankato, according to Mankato Police. Nelson was arrested shortly afterwards and jailed on charges of third degree assault.

Police believe there was a second person involved in the altercation but have not named that suspect.

Rebeka Kolstad, Kolstad's sister, tweeted on Sunday, 'Please everyone who reads this pray for my big brother Isaac.'

On Sunday evening, friends, family members and former teammates of Kolstad gathered for a candlelight vigil at the Myers Fieldhouse on the MSU-Mankato campus.

'He's loving, he's charismatic. His personality is one of a kind. He is a family guy. He has a beautiful daughter and one on the way,' said Sam Thompson, a close friend and former teammate.

Family members have established a CaringBridge.org page for Kolstad. One family member posted an update, which said, '[Kolstad] is young and strong, but the battle he has in front of him is enormous. He had one surgery [on Sunday] to put a pressure gauge in his skull. He may need additional surgeries in the coming days. We do know that his brain did sustain permanent damage.'

To post your well-wishes, log on to http://www.caringbridge.org/visit/isaackolstad.

Nelson is a graduate of Mankato West High School, where he once led the team to an 11-1 record, according to the Gophers website. He is a winner of the Minnesota Mr. Football award and was named an ESPN Gatorade Minnesota Player of the Year, during his high school years.

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