 In 1959, DiPreta succeeded creator Ham Fisher and first successor artist Moe Leff on the long-running boxing strip "Joe Palooka".He continued on that strip, written by Jim Lawrence, Bob Gustafson, Ken Fitch, Morris Weiss, and Ed Moore, through its end in 1984.In 1983, he became the latest successor, following artists Marvin Bradley, Frank Springer, and Fernando Da Silva, of "Rex Morgan, M.D.