Rafael Palmeiro of the Texas Rangers becomes the 19th player to join the 500 home run club. In a 17 – 10 win, Palmeiro hits a full-count fastball into the right field stands off Cleveland Indians righthander Dave Elder.

On May 11, 2003 — Rafael Palmeiro of the Texas Rangers becomes the 19th player to join the 500 home run club. In a 17 – 10 win, Palmeiro hits a full-count fastball into the right field stands off Cleveland Indians righthander Dave Elder.

Source:
Baseball Reference May 11