For whatever reason, sometimes I am only able to find one card of certain players. To be considered a One-Card Wonder, a player must have been active since 1991 (when I started paying attention).
This is a 1998 Invincible Gems of the Diamond card. Tavarez spent a year as a backup outfielder for the Red Sox in 1997. He played in 42 games, hitting .174/.216/.243/.463. As you can see, not great numbers. He did not offer any power or speed numbers either, so there was good reason not to bring him back.