Peña, who caught the fly ball for the first out of the inning, appeared to smack Alvarez in the face with his arm as the left fielder sprinted in to try to make a play on the ball. Both players fell to the ground, where Alvarez remained for several moments while being tended to by manager Dusty Baker and the Astros training staff. He eventually rose to his feet, but the medical cart was called for to take Alvarez off the field. Peña also exited the game after the collision, leaving under his own power.
Alvarez is in the midst of a dominant season at the plate, batting .316/.412/.658 with 23 homers and 56 RBIs.