Winona State said in a news release that 22-year-old Shawn Afryl died Monday during a workout at Maxwell Field on campus. Information about his cause of death was not immediately available.
School officials said the 6-foot-3, 310-pound offensive lineman had recently enrolled after his transfer.
Illini coach Tim Beckman said in a statement that his players were saddened to hear of the death of a "great teammate."
Winona State coach Tom Sawyer said Afryl had shown maturity and leadership in his short time at the Division II school.
Afryl is a graduate of Niles West High School in Skokie, Illinois, in the Chicago suburbs.