Not only was he directly involved in a disputed play the Angels are officially protesting with Major League Baseball, but one batter later, he was knocked to the ground by 6-foot-6, 285-pound White Sox designated hitter Adam Dunn -- who was trying to score from second base on a single to left field.
Iannetta, who wasn't injured on the play and held onto the ball for the out, is listed at six feet, 230 pounds.
"I knew who it was [running]," Iannetta said. "I played against Adam for a long time and played with him in the [World Baseball Classic]. He's a great guy. I knew who was running."
Iannetta didn't, however, immediately know the status of his body or equipment.
"I felt fine. I was surprised," Iannetta said. "I popped up and did a quick little systems check to make sure everything was in the right place ... arms, legs, ribs. [Everything] came out OK."
Iannetta also made sure to thank Dunn before the slugger's next at-bat for not lowering his shoulder with intent to harm.
"He could've really lowered his shoulder and crushed me and I thanked him for not doing that," Iannetta said. "I was in the air. I never played football. Maybe that counts, I don't know. [I thanked him] during the game, his next at-bat, 'Thanks for not really crushing me.'"
Iannetta was replaced by a pinch-runner in the eighth inning, but it wasn't because of any injury. He started Saturday night's game behind the plate.