Jackson, who made his MLB debut the season before while with the Philadelphia Phillies, appeared in one game with St. Louis, throwing only two-thirds of an inning, walking one batter while giving up a hit, not factoring in a decision.
He’d find himself with the Kansas City Royals in 1972, appearing in seven games while posting a record of 1-2, before making his Big League swan song in 1973, splitting the year between the Royals and Cleveland Indians over ten appearances, again not factoring in a decision.
After a 1974 season spent in the Pittsburgh Pirates organization, he called it a career, finishing up with a record of 2-3, sporting an earned run average of 5.80 over 23 appearances and 49.2 innings of work, including three starts and seven games finished.