Farr attended Wichita State University, lettering in football and track.
During the 1967 season, Farr was the AFL co-leader in interceptions with ten (t – Westmoreland, Janik).
He led the AFL in interception touchdowns that year and was selected All-AFL and All-Pro.
Following the AFL–NFL merger, Farr signed with the St. Louis Cardinals beginning in 1970 where he finished out his NFL career.
He and his brother attended Hebert High School in Beaumont, Texas, and were among 16 pro footballers given the keys to the city in 1971.