Following a review lasting one minute and 16 seconds, the call was overturned.
"Mookie gets a good read, a good job and his speed carries him the rest of the way," Farrell said. "In the time he's been back, he's been doing things inside games he might not have done the first time he was here."
The play proved crucial, as Brock Holt bunted and reached on Janssen's error to load the bases on the next play, which ended up having a ripple effect.
"It was a good bunt, it was well placed, tried to be aggressive, tried to see what I could do once I got it and I just didn't get it," said Janssen. "Obviously that led to the bases loaded and nobody out."
Dustin Pedroia swatted a go-ahead, two-run single and then Mike Napoli blasted a three-run homer. Allen Craig capped the seven-run rally with a two-run blast as the Red Sox won, 11-7.
Even before two innings were in the books, there were two plays reviewed during Tuesday night's game at Rogers Centre.
Will Middlebrooks laced a double to centre field in the first inning, and Napoli scored easily from second. Craig attempted to score all the way from first base, but the relay throw home from second baseman Munenori Kawasaki beat Craig to end the inning.
There appeared to be a question about whether or not catcher Josh Thole had blocked the plate as Craig slid in. Farrell left the dugout to speak to home-plate umpire Hal Gibson, and after a quick meeting, the umpires initiated a crew chief review.
After a 29-second review, the original call was confirmed and the inning was over, but not before the Red Sox had given themselves a 3-0 lead. In the top of the second, Blue Jays manager John Gibbons used his challenge on a close play at first base. Betts walked and then almost got picked off first by knuckleballer R.A. Dickey.
Dickey's throw was low and into the runner, which allowed Edwin Encarnacion to make the tag at first. First-base umpire Chris Guccione called Betts safe on the play, and after Gibbons challenged, the call on the field stood.