The Rams won the NFC West crown in 1973 through 1976 thanks in part to the play of Olsen. They ranked first in the NFL in run defense in 1973 and 1974 and finished second in sacking opposing passers both years. In 1973 Olsen was voted the NFLPA NFC Defensive Lineman of the Year and the next season, 1974, he was the recipient of Bert Bell Award as the NFL MVP as voted by the Maxwell Club. Olsen accepted the award "on behalf of all who toil in the NFL trenches".