The Rangers slugger dropped down to get to Brad Peacock's pitch and crushed his 30th home run of the season from a kneel Tuesday night, giving Texas a 1-0 lead over the Houston Astros in the second inning. The Rangers went on to win 3-2.
Beltre's shot clanked off a wall 346 feet from home plate, beyond the seats above the left-field wall. It would have traveled 408 feet had it not hit the wall, according to ESPN Stats & Information.
This wasn't Beltre's first homer from one knee, including when he dirtied his pant leg while homering in Game 5 of the 2011 World Series.
It was the 443rd homer of Beltre's career, and this is his fifth season with 30 or more homers.
The Associated Press contributed to this report.