Mookie Betts celebrates with David Price and Xander Bogaerts after hitting a walk-off double to defeat the St. Louis Cardinals 5-4 at Fenway Park on August 16, 2017. (Photo by Maddie Meyer/Getty Images)

Mookie Betts celebrates with David Price and Xander Bogaerts after hitting a walk-off double to defeat the St. Louis Cardinals 5-4 at Fenway Park on August 16, 2017. (Photo by Maddie Meyer/Getty Images)