Toronto used its challenge, and replays showed that the ball arrived in first baseman Edwin Encarnacion's glove a split second before Byrd hit the bag. The call on the field was overturned, and Gibbons was successful for the first time in seven attempts.
"Big play, leading off that inning in a fairly tight game in a small ballpark," Gibbons said. "It was a heck of a play by Reyes, and maybe the tides are turning."
Instant replay also worked in the Blue Jays' favor earlier in the game. With Toronto up 3-0 in the sixth inning, right fielder Jose Bautista threw out Byrd at the plate when Byrd tagged up from third on a flyout to right. Umpires took a look to see if Blue Jays catcher Josh Thole blocked the plate correctly.
He did, and the out call was confirmed.
"I wasn't sure if [Byrd] had a lane or not," Phillies manager Ryne Sandberg said. "That was hard to tell. But it also gave [the umpires] a chance to check the tag. So that was [the umpires'] challenge."
Todd Zolecki is a reporter for MLB.com.
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.