Throughout the 1960s, this quartet terrorized opposing offenses. Olsen's play helped the Rams to the playoffs in 1967 and 1969. He was voted the club's Outstanding Defensive Lineman from 1967–70 by the Los Angeles Rams Alumni. In week 14, 1967, Olsen and the rest of the Fearsome Foursome were named the AP NFL Defensive Players of the Week for their performance against the Baltimore Colts. In the 1970s, Olsen continued his dominant play at defensive tackle and his 11 sacks in 1972 were second on the team. After week 8 in 1972, Olsen was named the Associated Press NFL Defensive Player of the Week for the third time in his career.