Like his better known father, Bill Jr. was a pitcher. Junior appeared in the 1959 Cleveland Indians' spring camp as a non-roster invitee.
This photo (apologies for its quality, but I couldn't find any other for him) is from the Greensboro (NC) Record of August 8, 1956. It shows him with the Winston-Salem Twins.
http://www.baseball-reference.com/re...d=dietri002wil