By Danny Zimmerman, did you mean Denny Zimmerman?

If it's Denny, he was born on December 14, 1940 in Glastonbury, Connecticut. He was a URC Sprint Car driver in the 1960s who also qualified for the Indianapolis 500 on two occasions. In 1971, he started 28th and finished 8th. In 1972, started 28th and finished 19th.

After his retirement from racing, Denny became an airline pilot. He currently resides in in Suffield, Connecticut.