Keith Fahnhorst, a Pro Bowl offensive lineman who spent all 14 of his NFL seasons with the San Francisco 49ers, died Tuesday at the age of 66, the team announced Thursday.
Fahnhorst, a two-time All-Pro, played in 193 games -- starting 160 -- for the 49ers, which ranks eighth in franchise history. He won two Super Bowl rings with the team.
No cause was given.
Fahnhorst also was twice honored with the Bobb McKittrick Award, which is given annually to the 49ers offensive lineman who best represents the courage, intensity and sacrifice displayed by the longtime offensive line coach.
Former teammate Randy Cross noted on Twitter that he and Fahnhorst were teammates for 12 years. Cross played right guard next to him for 9 1/2 years.
Keith was my teammate for 12 years and I played RG next to him for 9 1/2 years. We won SB's together, went to ProBowls together, lockered next to each other + I was lucky to call him my friend. WorldClass Dad + Husband who was gentle + kind to all. RIP https://t.co/Zcr5BQ79y1
— Randy Cross (@randycrossFB) June 15, 2018
Fahnhorst is the second member of the 49ers' title winning teams of the 1980s to die in the last two weeks. Receiver Dwight Clark died at 61 from Lou Gehrig's disease, the neurological condition that attacks cells that control muscles.
Fahnhorst, who was an All-Big Ten tight end at Minnesota, was selected with the 35th overall pick in the 1974 NFL draft.
The Associated Press contributed to this report.