Jake Odorizzi found himself in a jam after Xander Bogaerts singled with two outs and Sandy Leon followed with a walk to bring Mookie Betts to the plate.
The Red Sox center fielder hit a sinking liner to center. Kiermaier charged then dove at the last minute to make the catch to prevent one run and possibly two from scoring to maintain the 1-1 tie.
"Bad jump right there," Kiermaier said. "Mookie just barrels up everything and that was one where I thought I saw it come off a little harder than what it did. I took a few steps back, then I reacted. I liked my chances where the ball was.
"I knew once I made that bad read, I had to make up for it. Once I was committed to diving, I knew I had a chance. Thankfully, it went in the glove. Good catch. I was happy with that. But the read itself, that bugged me a little bit."
Bill Chastain is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.