Who was the only Philadelphia Phillie player on the roster for the 1993 and 1980 world series?

Hmmm ... according to the rosters I see provided by Baseball Almanac, the only player that played for both the 1980 and 1993 Phillies was left handed pitcher Mark Davis. However, he did not participate in the postseason either year. He was a late season call up in 1980 and was not available for postseason play and was released by the Phillies on July 2, 1993 and did not participate in that postseason.