Although Maldonado had statistically good seasons in San Francisco, he was involved in one of the most infamous plays in Giants history. In game 6 of the 1987 National League Championship Series, he lost Tony Peña's 2nd inning fly ball in the lights. This play resulted in a triple for Peña. Peña scored on a sacrifice fly for the only run of the game, which the St. Louis Cardinals won to tie the series at 3 games each, before going on to win Game 7.