TORONTO -- Dalton Pompey hit his first major league homer and the Toronto Blue Jays roughed up Felix Hernandez for a career worst-tying eight earned runs in a 10-2 victory over the Mariners that further dented Seattle's fading wild-card chances.
The slumping Mariners fell three games out of the second AL wild-card spot with five games remaining.
Despite the win, Toronto was eliminated from playoff contention when Kansas City beat Cleveland.
Seattle lost its fourth straight thanks to another poor effort by a starting pitcher. Mariners starters have failed to complete five innings in any of the past four games, allowing 27 earned runs over 14 2-3 innings in that span for an ugly ERA of 16.56.
Hernandez (14-6) came in with a 2.07 ERA this season and had allowed just three earned runs in 28 innings over four September starts. He gave up a run in the first on Encarnacion's RBI single, but retired the next 11 batters, striking out five.
Jose Reyes singled, Jose Bautista walked and Encarnacion drew a bases-loaded walk before Adam Lind hit an RBI single. Munenori Kawasaki drove in a run with a fielder's choice, and Pompey walked before Dominic Leone replaced Hernandez.
Leone did Hernandez no favors, hitting Gose with a pitch to force in another run and giving up an RBI single to Thole before Goins flied out, ending the seven-run, 13-batter inning. The seven runs were the most ever allowed by Hernandez in a single inning.
Hernandez gave up seven hits, walked three and boosted his career-high strikeout total to 241.
Blue Jays: Lind returned to first base after missing the previous three games with a sore back.