Schroll played from 1958 through 1961 for the Boston Red Sox (1958–59), Philadelphia Phillies (1959), Chicago Cubs (1960) and Minnesota Twins (1961).

Schroll signed with the Red Sox in 1951 and spent seven full years in minor league baseball before getting an opportunity to pitch for Boston.

[1] But six days later, Schroll was tagged with his first MLB defeat when he allowed three ninth-inning runs to the Pittsburgh Pirates, wiping out a 5–4 Phillie lead.

That December, he was traded to the Chicago Cubs for 36-year-old outfielder Bobby Thomson, the 1951 New York Giant hero entering the final year of his MLB career.

In a four-season MLB career, Schroll posted a 6–9 record with a 5.34 ERA in 35 appearances, including 13 starts, three complete games, 63 strikeouts, 64 walks.