Former NFL quarterback Erik Kramer's 18-year-old son, Griffen, is dead from what is suspected to be alcohol poisoning.

Griffen Kramer, who was a senior at Thousand Oaks High School in California, died on Sunday. His body was found at a friend's house in Agoura Hills.

He was a backup quarterback for his high school football team.

According to NBC Los Angeles, school officials suspect alcohol may have been involved.

He reportedly went to sleep and did not wake up. Although the cause of death isn't official, initial indications suggest his passing was due to alcohol poisoning, wrote school principal Lou Lichtl in a statement reported by NBC Los Angeles.

Erik Kramer was a quarterback for the Chicago Bears.

Lichtl said Griffen transferred to Thousand Oaks High from Agoura High School before his junior year.

The Chicago Bears team tweeted its condolence to the Kramer family.

LM: Very, very sad news: Ex #Bears QB Erik Kramer's 18-year-old son, Griffen, passed away Sunday. Our thoughts & prayers are with u, Erik, the team wrote.