Olson entered the 1969 NHRA Winternationals at Auto Club Raceway in Pomona, California, but failed to qualify.
[3] He also entered the 1971 AHRA Winter Nationals at Beeline Dragway in Scottsdale, Arizona.
[10] At the NHRA Division 7 All Pro Championship Series at Orange County International Raceway (OCIR), in Irvine, California, on 13 February, Olson lost to Clayton Harris, taking a purse of US$750.
[15] 1972's Le Grandnational at Sanair in Saint-Pie, Quebec, saw Olson reach the semi-final, before being eliminated by eventual event winner Art Marshall.
[17] The 1972 INRA U.S. Open at North Carolina Motor Speedway in Rockingham, North Carolina, was a success for Olson, defeating Flip Schofield in round three, Garlits in the semi, and Ivo in the final; the scheduled final was rained out, and had to be run the next day.
[18] Dallas International Motor Speedway hosted the 1072 IHRA Nationals in Lewisville, Texas.
[19] Olson returned to Ontario Motor Speedway for the 1972 Supernats, beating Randy Allison (in round one) and Herman Petersen, before being eliminated by eventual winner Don Moody in the semi-final.
The 1973 NHRA World Finals at Amarillo Dragway in Amarillo, Texas were another disappointment; though qualifying #2, and beating #10 qualifier Bucher in round one, Olson lost to Phil Hobbs in the quarter-final round.