Matt Stairs of the Pittsburgh Pirates hits a home run off Houston Astros pitcher Wade Miller which is estimated at 461 feet, making it the longest in the history of Minute Maid Park.
On May 5, 2003 — Matt Stairs of the Pittsburgh Pirates hits a home run off Houston Astros pitcher Wade Miller which is estimated at 461 feet, making it the longest in the history of Minute Maid Park.
Source:
Baseball Reference May 5