PHOENIX -- Cincinnati Reds left fielder Spencer Steer had the ball in his glove, a home run stolen.

One problem: a young fan stole the ball out of his glove.

Arizona's Tommy Pham hit a ball to deep left in the seventh inning of Friday night's 10-8 win that drove to the edge of the wall. Steer timed it perfectly, leaped and had the ball in his glove for a second. The fan, also wearing a glove, reached in and pulled the ball out, leaving Steer slumped against the wall after he landed.

The umpires initially ruled Pham's shot a home run and fans cheered after seeing the kid's catch.

A video review called him out for fan's interference, leading to boos across Chase Field.

The Associated Press contributed to this report.