Then in 1943, Zimmerman played for the Steagles, a team that was a combination of the Philadelphia Eagles and Pittsburgh Steelers (the teams were forced to merge because both had lost many players to military service due to World War II).

For 26 years after his NFL career, he played professional fast-pitch softball and led his teams, the Fresno Hoak Packers and the Long Beach Nitehawks, to nine world titles.

He was inducted into the International Softball Congress Hall of Fame in 1970 and the award for the outstanding pitcher in the ISC World Tournament is named in his honor.

In 1955, he began teaching and coaching at Madera High School, where he remained until his retirement in 1981.

[5] He married Dena Mary Otis of Big Timber, Montana on May 3, 1940, and they had three sons.