Montero, a September callup, batted seventh and played as the designated hitter against Toronto. With two outs in the sixth inning, he snuck the ball through to left field off Blue Jays starter Ricky Romero.
"Very excited, very happy to be on first base," Montero said. "Thank God that I hit the ball well to shortstop. At first, I thought he was going to catch it. I was like, 'Oh, don't catch it.' But thank God I got a base hit."
Montero said he would give the ball to his father, who was watching on television. Montero's mother moved with him from Scranton, where he had been playing with the Yankees' Triple-A affiliate.
"He saw me on TV a couple of days ago and he was crying," Montero said. "When I give him the ball, it will be a big present for him."
Montero, 21, was signed as a catcher and has played there in the Minor Leagues. But questions remain about his defense. He hit .290 with a .350 on-base percentage for Triple-A Scranton/Wilkes-Barre this season.