Bautista was hit by a pitch earlier in that inning. The umpire considered it deliberate and issued a warning to both benches. (Note: In the 8th inning of a one-run game when you have just taken the lead in the previous half-inning, you don’t normally put the tying run on base to lead off the inning by hitting the guy on purpose.)
The Blue Jays also had some bad blood toward Odor from last season’s playoffs. Odor scored big runs in the Ranger victories in the games in Toronto due to some heads up baserunning, including a go-ahead run late in the final game of the series on a play that the Blue Jays incorrectly believed was a dead ball. As a result of that play the low-class Toronto fans delayed the game for several minutes by throwing things onto the field at the Ranger players.
In the bottom of the inning, the Jays relief pitcher hit Fielder in the hip in what was a very obvious intentional plunk. Since a warning had already been issued, he was ejected along with the acting manager (since the manager had already been ejected earlier).
Nobody gets slugged just for a hard slide.
This goes back to last year.