A 6 ft 2 in (1.88 m), 195 lb (88 kg) right-handed pitcher, he played parts of three seasons in Major League Baseball, appearing in 32 games for the 1953 St. Louis Cardinals and the 1958–59 Washington Senators.

After his first recall from the minor leagues, Romonosky started two games for the Cardinals at the end of the 1953 campaign, earning no decisions.

[1] Romonosky allowed three earned runs and seven hits in six innings, with two bases on balls and three strikeouts.

Sent back to the minors by St. Louis for the 1954 season, Romonosky didn't return to the majors until July 1958 as a member of the Senators.

[2] All told, Romonosky yielded 97 hits and 51 bases on balls in 101⅓ major league innings, with 63 strikeouts.