Pillar didn't react kindly to the move when he returned to the dugout, tossing his bat into the tunnel. One day later, the rookie outfielder was optioned to Triple-A Buffalo in favor of outfielder Brad Glenn.
"It didn't help him at all," Gibbons said when directly asked if the reaction prompted the transaction. "This is a team game, you know, there's no room for selfish play. But we've been thinking about Glenn for awhile anyway."
Pillar also apparently had a few choice words when he walked through the dugout before reaching the tunnel. He later sat down before being summoned for a conversation with Gibbons. During that exchange, Pillar also casually tossed his batting gloves while Gibbons appeared to do most of the talking.
"He wasn't real happy, I know that," Gibbons said.
The response presented Glenn with an opportunity to take over Pillar's platoon role with Gose. Glenn is expected to receive at-bats vs. left-handed pitchers, at least until Jose Bautista is able to return from a mild strain in his left hamstring.
Glenn, whose contract was purchased from Buffalo, appeared in 30 games for the Bisons and hit .381 with eight doubles, four homers and 22 RBIs. He began the year in Double-A New Hampshire, where he hit .235 with five homers and 14 RBIs in 36 games.
To make room on the 40-man roster for Glenn, utility infielder Jonathan Diaz was designated for assignment. Diaz appeared in 23 games for the Blue Jays earlier this season, and hit .158 (6-for-38) but did provide well-above-average defense.
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.