Pete LaCock had a fairly unspectactular 9 year career in MLB. He was drafted in 1970 by the Cubs and made his MLB debut in September 1972. In all he played during 5 seasons as a Cubs. As a Cubs he appeared in 263 games while compiling a batting average of .221 with 15 home runs and 73 RBI's.
In December of 1976, LaCock was part of a three team (Cubs, Mets and Royals) trade that sent him to the Royals. He was granted free agency in 1980 but never played again in the majors.
LaCock's non-baseball claim to fame is that he is the son of Peter Marshall (Hollywood Squares) and actress, Joanne Dru.