Olsen was the anchor of the vaunted Los Angeles Rams defensive line known as the "Fearsome Foursome."
In his 15 seasons with the Rams from 1962 to 1976, Mr. Olsen never missed a game and was named to 14 consecutive Pro Bowl teams
After his playing career, he was a TV football analyst for 16 years, had leading roles in the wholesome frontier dramas "Little House on the Prairie" and "Father Murphy" and was the longtime spokesman for FTD florists.