 The following season, he was moved up to the class-A Pueblo Dodgers, and made his major league debut in July.He played 24 games for the Cubs, with just 6 hits in 35 at-bats, including his first and only major league home run off Ray Semproch of the Philadelphia Phillies on August 3, 1958.In , Jackson spent most of the season back in the minors, most of it with the class-A Lancaster Red Roses.