Encarnacion hit a towering home run, J.A. Happ won his third straight start and the Blue Jays completed a three-game sweep of Oakland, beating the Athletics 3-1 on Sunday.
Encarnacion hit a one-out drive into the second deck off Oakland left-hander Drew Pomeranz in the fourth. The homer was Encarnacion's 12th this month, tying the team record for May set by Jose Bautista in 2010.
"You've got to make sure you're watching," catcher Erik Kratz said of Encarnacion's at-bats. "He makes the game look a little bit easier. It's definitely exciting to watch."
The Blue Jays' record for home runs in a month is 14, set by Bautista in June 2012. With six games remaining before the calendar changes, Encarnacion is putting that mark in serious peril.
"When he gets hot, nobody can stop him," shortstop Jose Reyes said of Encarnacion.
Encarnacion's homer snapped a streak of 18 scoreless innings by Pomeranz, who hadn't allowed a run since the eighth inning of a May 2 loss at Boston.
Bautista greeted reliever Jim Johnson with a first-pitch RBI single in the fifth, but Jose Reyes was thrown out trying to score from second on a one-hop throw by Yoenis Cespedes.
One batter latter, Gibbons was ejected for the first time this season after losing a replay challenge.
Gibbons challenged after second base umpire Paul Schrieber ruled that Bautista had been forced out on Encarnacion's blooper to shallow center field.
After a review of 2 minutes, 24 seconds, it was ruled that Schrieber's call stood. Gibbons returned to the field to argue and was quickly ejected by home plate umpire Mark Carlson.
Toronto made it 3-0 in the seventh when Reyes singled off Luke Gregerson, stole second and third and scored on Bautista's sacrifice fly.
Pomeranz (4-2) allowed two runs and five hits in four innings, the shortest of his four starts this season. The left-hander walked a season-high four and struck out three.
Reyes matched a career high with three stolen bases, achieving the feat for the first time since September 2008. ... Oakland INF Nick Punto (left calf) missed his second straight game. ... Encarnacion, Bautista, Melky Cabrera and Reyes wore pink armbands to mark Mother's Day in the Dominican Republic. ... Attendance was 45,277, Toronto's fourth sellout of the season. ... Oakland returns home Monday to host Detroit. Tigers LH Tommy Milone (2-3) faces Athletics LH Drew Smyly (2-2). ... Toronto begins a three-game series against Tampa Bay on Monday. Rays LH Erik Bedard (2-2) faces Blue Jays RH Drew Hutchison (3-3).
Copyright by STATS LLC and The Associated Press
TORONTO, CANADA - MAY 25: Jose Reyes #7 of the Toronto Blue Jays advances safely to third base on a groundout in...