LaCock, son of former TV personality Peter Marshall, appeared in eleven games for the Chicago Cubs during the 1973, his second year in the Big Leagues after making his debut in 1972 with five games.
Over those eleven games LaCock hit .250 with four hits over 16 at-bats, driving in three runs, before coming back in 1974 with 35 games, hitting .182 with twenty hits in 110 at-bats.
In 1975 he’d finally get some real action in the Majors when he played in 106 games, hitting .229 with 57 hits in 249 at-bats, hitting six homers and driving in 30.
He would end up putting in nine years in the Big Leagues, splitting his career between the Cubs and Kansas City Royals, collecting 444 hits and batting .257 over 715 games.