In 1999, he struggled in the rotation with 13–11 with a 5.23 ERA. On April 23, 1999 he became the only pitcher in the history of baseball to allow two grand slams in the same inning and to the same player, Fernando Tatís of the St. Louis Cardinals. There are two more pitchers in the history of baseball who allowed two grand slams in the same game – Jack Morris, and more recently, Brandon Backe – but to different hitters in different innings. He also walked 100 batters in only 194 innings. On June 5, 1999, Park was involved in an on-field brawl at Dodger Stadium with Anaheim Angels pitcher Tim Belcher. Park attacked Belcher after being tagged out after a bunt play. Park's said that Belcher had tagged him too hard on the just-concluded play and asked him about the incident. According to Park, Belcher replied with racist comments causing Park to kick him.