An eight-year-old U.S. girl with a 3D-printed prosthetic hand threw the first pitch at Tuesday night鈥檚 Toronto Blue Jays game against the Boston Red Sox. It was the 25th time she鈥檚 had the honour at a Major League Baseball stadium.

Hailey Dawson was born with which is a birth defect that leads to missing or underdeveloped muscles on one side of the body. In Hailey鈥檚 case, she is missing her right pectoral muscle and three fingers.

After getting a prosthetic hand from the University of Las Vegas Nevada, Dawson was asked to throw out a pitch at a Baltimore Orioles game in 2015. Soon, the Washington Nationals asked her to throw their honorary pitch.

鈥淎fter that, she kept asking, what鈥檚 next?鈥� Hailey鈥檚 mother, Yong Dawson, told 麻豆传媒. 鈥淚 said, do you want to throw it out for all 30 ball leagues? She said yes.鈥�

Hailey told 麻豆传媒 Channel that throwing out the pitch in front of thousands of people doesn鈥檛 make her nervous. Asked to pick a favourite game, she said, 鈥渁ll of them.鈥�

Dawson said the goal is to raise awareness about Poland syndrome and also just to let people know that 3D-printed hands are available.

For Hailey, the hand has a been a big confidence booster, according to her mom.

鈥淲hen she puts it on, she garners a lot of attention,鈥� she said. 鈥淗er classmates and everyone thinks it鈥檚 cool so it鈥檚 helping with her self-esteem and confidence."