Cincinnati Reds left fielder Spencer Steer had the ball in his glove, a home run stolen.
One problem: A young fan snatched 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.
"Once I saw what happened, I had the same reaction every fan had in the stadium -- that it was a pretty remarkable play by the kid," Diamondbacks manager Torey Lovullo said. "It looked like the ball was in Steer's glove and the kid stole it. I don't know how he did it."
The umpires initially ruled Pham's shot a homer, and the hometown fans chanted "MVP! MVP!" at the kid when they saw video of his robbery.
The home run was negated after review, setting off a chorus of boos at Chase Field. The Diamondbacks' broadcast showed the kid and his family being removed from their seats by security.
"I was in the dugout like, 'Out, it's clear interference,'" Pham said. "I just feel bad for him because kids really don't know that interference rules, so sucks that you got to get kicked out for that."
The Associated Press contributed to this report.