Mudrock was a right-handed pitcher who spent a decade (1956–1965) as a professional, but who appeared in only one inning of one Major League game on April 19, 1963.
Mudrock batted right-handed, stood 6 feet 1 inch (1.85 m) tall and weighed 190 pounds (86 kg).
Listed on the Cubs' 40-man spring training roster for 1963,[1] Mudrock began the National League season with Chicago and made his debut at Candlestick Park against the defending NL champion San Francisco Giants.
He entered the game in relief of starting pitcher Larry Jackson in the eighth inning, with the Cubs trailing 4–0.
In his one inning of relief, he surrendered a lead-off double to Jim Davenport and an RBI hit to Willie McCovey.