Kroll kicked around with the Phillies and Mets before he was dealt to the Astros for outfielder Johnny Weekly during the 1966 season. He was sold to the Indians and came back to the majors briefly with Cleveland in 1969 for his final big league appearance.

Overall, Kroll compiled a 6-7 record with a 4.24 ERA in 71 games over four seasons. Ten games were with the 1966 Astros.