Jul 18, 2007 6:36 PM EST

Cubs first baseman Derrek Lee dropped his appeal of a five-game suspension Wednesday and began serving it immediately with the game against the San Francisco Giants.

Lee, who has hit two home runs in the last three games, had appealed the penalty, imposed upon him for his actions June 16. In that game, Lee was hit by a pitch by San Diego's Chris Young and said something to Young as he walked to first base. The two exchanged words, and Lee took exception to what the Padres pitcher said and swung at him. Lee missed, but the two tusseled and sparked a bench-clearing melee.

Via MLB.com