When the season started, Leonard had no sponsor on his #15 Vel's Parnelli Jones Racing PJ Colt-Ford for the season-opening pair of races, the Rafaela Indy 300 at Autódromo Ciudad de Rafaela.
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In 1973 Leonard would return to Vel's Parnelli Jones, driving the #1 Samsonite Parnelli VPJ-2-Offenhauser.
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Of their three cars in 1973 only Andretti in 5th place would make the top 10, they alost their Samsonite sponsorship at the end of the year and Firestone (Vel's Parnelli Jones tire supplier since in the USAC National Championship since their debut in 1967) was cutting back their racing funding before pulling out completely at the end of the year.
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Starting with the Trenton 200 at Trenton International Speedway, the car got sponsorship from Samsonite.
The remaining three cars with Graham Hill, Joe Leonard, and Art Pollard were entered for the race, with Leonard claiming pole position.
Leonard Bernstein | Joe Cocker | Leonard Compagno | Leonard Cohen | Joe Louis | Joe Henderson | Joe Satriani | Joe Biden | Joe DiMaggio | G.I. Joe | Leonard Nimoy | Joe Frazier | Joe Lovano | Fat Joe | Joe Dever | Joe Walsh | Sugar Ray Leonard | Joe Manchin | Elmore Leonard | Joe Zawinul | Joe Namath | Joe Lieberman | Joe E. Brown | Joe E. Brown (comedian) | Joe | Joe Paterno | Joe Clark | Joe Bonamassa | Joe Dante | Leonard Wood |