Gibbons came out of the dugout to ask the umpiring crew to take a closer look at the play. It wasn't a team challenge, because Gibbons felt there was a possible violation of Rule 7.13, which states the catcher must provide a clear basepath for the runner.
When umpires take a look at whether the catcher blocked the plate, they also are permitted to examine whether the original call on the field was correct. In this particular case, replays showed that Pillar avoided the tag from catcher Caleb Joseph for long enough to touch a piece of the plate with his left hand.
Following a review of 3 minutes and 17 seconds, the call on the field was overturned and Toronto was awarded an extra run. That gave the Blue Jays a 4-2 lead and allowed the seventh inning to continue. Jose Bautista then came to the plate and flied out to left field. But, by then, the damage had already been done.
Gregor Chisholm is a reporter for MLB.com. Read his blog, North of the Border, and follow him on Twitter @gregorMLB. This story was not subject to the approval of Major League Baseball or its clubs.