PORTLAND, Ore. (KOIN) — Portland State University redshirt freshman linebacker AJ Schlatter died Sunday night after suffering a “medical emergency at home,” the school confirmed on Monday morning.

Schlatter had his tonsils removed Friday, his father, Jim, wrote on his Facebook page. An autopsy will be performed Tuesday to determine the cause of death.

Friends and teammates described Schlatter as always happy and someone who gave his all. PSU head football cocah Bruce Barnum said he was a gem as a player and as a role model.

Jim Schlatter was at one time a PSU assistant coach and is now the assistant football coach at Canby High School, where AJ played his prep ball. AJ’s mother, Terri Jo was a star volleyball player and assistant coach from the early 1980s to the early 1990s and is a member of the PSU Athletics Hall of Fame

The PSU Vikings site said this about AJ SchlatterPREVIOUS TO PORTLAND STATELettered three times in football at Canby High School… earned first team All-League as a tight end and linebacker his senior season… named second team All-State… made 101 tackles, 19 tackles for loss, 6.5 sacks and forced five fumbles… caught 11 passes for 193 yards and three touchdowns… selected to play in the Les Schwab Bowl All-Star game.PERSONAL INFORMATIONSon of Jim and Terri Jo Schlatter… plans to major in Health Science or Business… works as a youth sports camp counselor… his sister, Garyn, played volleyball at Portland State and ranks as one of the top Vikings in its Big Sky history… father Jim coached football at PSU in the 1980s… mother Terri Jo played on the Vikings National Champion volleyball team in 1984, then coached at PSU until 1992… another sister, Kasey, plays volleyball at Montana State.Jim Schlatter’s post

The freshman player’s father posted on Facebook, saying “I failed my son tonight. Believe he might have developed a blood clot after his surgery for the removal of his tonsils on Friday. I could not recessatate him nor did the best efforts by ems and the emergency room staff.”