In 2004, Giles was poised to wage a campaign similar to 2003 but, on May 15, 2004, against the Milwaukee Brewers, while drifting way back into center field to catch a pop fly, he collided with center fielder Andruw Jones. Giles suffered a broken collarbone, a concussion, and a bruised right wrist and did not play again until July 15, 2004, missing 52 games.