Players left crying after girl hit by 170km/h ball at Yankees' game

A young girl has been taken to hospital after being hit by a foul ball at a New York Yankees Major League Baseball game.

Yankees manager Joe Girardi has been told a young girl hit by a ball at their MLB match is OK. (AAP)

A young girl at Yankee Stadium was injured by a 105mph (170km/h) foul ball off the bat of Todd Frazier during the Major League Baseball game against Minnesota, leading some players to call for protective netting to be extended.

The Yankees said the girl was taken to hospital for treatment, and New York manager Joe Girardi said he had been told by team security that she was OK.

The game was delayed for about four minutes while she was attended to and then carried from the seats in the bottom of the fifth inning.

A shaken Frazier crouched with his hands over his face.

The Yankees third baseman then bowed his head, walked away from the plate, crouched again and rested his head on the end of his bat.

"I thought of my kids. I have two kids under three years old and I just hope she's all right," said Frazier, who flied out later in the at-bat.

"I know the dad or whoever it was that was with them was trying their hardest, but the ball's coming at 120 miles an hour at them and the ball's hooking. So it's like if you've never seen a ball like that, which most people in the world haven't, it's very tough."

Asked whether there should be more netting, Yankees rookie slugger Aaron Judge said: "We need it."

Twins players also were distressed, and second baseman Brian Dozier and the Yankees' Matt Holliday had tears as they said prayers at second base.

"We've been trying to get these teams to put nets up," Dozier said.

"Number one, you don't bring kids down there. And number two, every stadium needs to have nets. That's it. I don't care about the damn view of the fan or what. It's all about safety. I still have a knot in my stomach."

Speaking through a translator, Twins infielder Eduardo Escobar said, "I just saw blood coming out of this little girl."

He said perhaps kids under a certain age be prohibited from seats without protection.

Major League Baseball issued recommendations for protecting netting or screens in December 2015, encouraging teams to have it in place between the ends of the dugouts closest to home plate.

The New York Mets extended netting beyond the outfield ends of the dugouts this summer.