Incredible moment when the ball gets stuck in the light of Fenway Park… leaving Red Sox fielder Masataka Yoshida stunned and allowing Matt Duffy to run home from Royals (only to be sent back!)

Fenway Park’s bizarre anatomy came into play Wednesday night when a batted ball broke through and landed in one of the lights on the Green Monster’s scoreboard.

In the top of the second inning and with a runner on first base, Kansas City Royals batter Kyle Isbel made contact with the ball and sent it deep.

As it flew, Red Sox left fielder Masataka Yoshida jumped up to grab the ball in the air – but missed when the ball went over his glove. It broke through one of the red “Out” lights in Fenway’s old left field scoreboard and came to rest there.

It got stuck in the light, causing Yoshida to start looking around for the ball as Royals baserunner Matt Duffy, who was leading at the time, ran home.

But after the dust settled – and Yoshida retrieved the ball – Duffy was sent back to third base.

Outfielder Masataka Yoshida had to dig the ball out of the light into the Green Monster scoreboard to try and make any kind of play when Royals runner Matt Duffy scored

That’s because under MLB rules, that constituted a “baseline double” that automatically entitles both Duffy and Isbel to two bases.

It’s all part of MLB Rule 5.05, Section a, Subsection 7, which reads: “(The batter becomes a runner when:) Any fair ball which, before or after hitting the ground, passes through or under a fence passes, or through or under a scoreboard, or through an opening in the fence or scoreboard, or through or under undergrowth, or creepers on the fence, or which extend into a fence or scoreboard, in which case the batter and runners are entitled on two bases. ‘

That meant that Duffy was able to advance two bases to third base and that double was credited to Isbel.

Unfortunately for the Royals, they couldn’t bring anyone else home – and Duffy and Isbel were stranded.

This piece baffled longtime baseball fans — including legendary Red Sox radio voice Joe Castiglione who said (as told by Jared Carrabis) that in the 41 years he’s been calling games in Boston, he’s “never seen this before.”

But the umpires called it a double under the rules, leading Duffy (above) to head back to third base

Fenway Park is the oldest baseball stadium in the United States and has been open and in use since 1912.

The old scoreboard in question was installed on the ‘Green Monster’ in 1934 and is operated manually to this day – with workers updating the scores both in-game and elsewhere in the country.

There is a particular classification of a double ground rule, known as a “home park ground rule double,” that was created to account for unique playing conditions in specific ballparks.

Fenway has one of those rules. If a ball is hit through a hole in the scoreboard while the scorers working in the Green Monster switch numbers, that batter gets a double rule.