Statcast™ projected the homer at 406 feet with an exit velocity of 102.8 mph, along with a 30-degree launch angle.
"Just trying to hit a ball hard," Yelich said. "Put a good swing on it. It just happened."
The Cardinals took a 2-0 lead in the fifth on Greg Garcia's two-run homer off Jose Urena.
Miami was able to counter immediately. In the sixth, Dee Gordon had a one-out double, and Stanton reached on a tough error. He blistered a liner at 117.6 mph, and second baseman Matt Carpenter, who was shifted up the middle, made a leaping attempt. He knocked the ball down, but rushed a throw that was off the mark.
"That's a tough error," Yelich said. "It was like 180 mph off the bat, or something like that. A new record. It's tough. It almost took Carpenter into center field with him."
The error put runners on first and second with one out.
"We hit some balls hard," Yelich said. "It was a little break for us, which was big. That was a weird play. It went from an inning-ending lineout double play to being an out at first to nobody being out, to first and second. Just one of those freak baseball plays. You never know what you're going to see on any given day."
With the count full, Lynn elevated a 94-mph fastball to Yelich, who didn't miss it.
"He's a good hitter, put a good swing on it and put a good charge opposite field there," Lynn said. "I would like to have that pitch back."