Prall appeared in the only games of his career in the first couple of weeks of the 1975 season, going 0-2 over three games with a bloated 8.59 earned run average, all starts.
Originally drafter by the San Francisco Giants, he played in their Minor League system between 1971 and 1973 before being traded to Chicago for catcher Ken Rudolph.
After his brief MLB tenure he’d stick around pitching in the Minor Leagues, for both the Cubs and finally the Milwaukee Brewers before retiring for good after the 1977 season.