Well, this one is going to be fast. John Lickert is the most obscure player who spent time with Boston in 1981. His entire Major League career consists of one inning of one game in which he spent behind the plate and did not garner a single plate appearance.
Lickert was drafted by the Red Sox in the 13th round of the 1978 draft. He was not much of a hitter in the minors, but he certainly was not terrible. In the minors in 1981, the catcher hit .255/.327/.354 with six home runs and 60 RBIs. He was only 21 so there was still reason to be optimistic. But, despite similar numbers in the next couple of seasons, Lickert never made it back. Part of that was due to falling behind on the depth chart to Rich Gedman, who would become a damn good backstop for a few years in the mid 1980's. Lickert stayed in the Red Sox organization into the 1985 season, then spent a brief period in the Braves system that same year. That was it for Lickert's playing career.