Fists flew Thursday at the end of the sectional title match at Maple Grove High School between the Totino-Grace High School and Prairie Seeds Academy boys soccer teams.
Suspensions and criminal charges are possible, according to the Star Tribune, with the Maple Grove Police Department investigating the incident.
The Minnesota State High School League is also investigating, according to Channel 12, and expects to conclude its investigation on Monday.
One Totino-Grace player received stitches for an injury from a punch, Channel 12 reported.
Channel 12 reporter Jay Wilcox said it was the worst fight he has seen in 25 years of covering high school sports. The fighting also involved coaching staff and people on the sidelines, Wilcox said.
Prairie Seeds Academy won the game 2-1 after the team broke a 1-1 tie with less than three minutes left to play. Prairie Seeds will play Marshall School of Duluth on Friday in the opening round of the state tournament, according to the Star Tribune.