He played part of the 1945 season in Major League Baseball for the New York Giants in 1945. The 28-year-old rookie stood 6 ft 2 in (188 m) and weighed 187 lbs. Zimmerman is one of many ballplayers who only appeared in the major leagues during World World War World War II He made his major league debut on September 2, 1945 in a doubleheader against the Brooklyn Dodgers at the Polo Grounds.
He hit well and exhibited some power during his one-month stay with the Giants.
Season and career totals include 27 games played, a.276 batting average (27-for-98), 5 home runs, 15 runs batted in, 14 runs scored, and a slugging percentage of.439. He made 3 errors in 25 games at first base and had a fielding percentage of.988.
Zimmerman died in his hometown of Pine Grove, Schuylkill County, Pennsylvania, at the age of 75.