For a month or so, the Yankees have gotten used to looking up at the scoreboard and discovering that the Blue Jays have put up a huge number in the early innings against some shell-shocked opponent.

On Friday night, the Yankees didn't have to look up. Six batters into the first game of this AL East showdown, Toronto had five runs against Luis Severino.

Toronto didn't stop there. Former Yankee Russell Martin hit two of his team's five home runs as the Blue Jays widened their division lead to 2½ games with an 11-5 victory before 40,220 at Yankee Stadium.

The Yankees led the Blue Jays by eight games on July 28, but since then, Toronto has gone 30-9 to the Yankees' 20-20.

Alex Rodriguez, who will be honored Sunday for his 3,000th hit, went 0-for-4 with four strikeouts and heard the rare sound of boos.

Friday night was all about failed tests for the Yankees.

Mark Teixeira's medical tests finally revealed a season-ending leg fracture. Severino couldn't pass a huge test in his seventh big-league start.

And the Yankees came up short in their biggest test to date: the first of four games in three days against Toronto after Thursday's rainout. They will meet Saturday afternoon in a single-admission doubleheader.

The Yankees' day began with the grim Teixeira news, which was announced by general manager Brian Cashman in the home dugout during batting practice.

Severino's night started with a double by Ben Revere. He then slipped off the mound while delivering his fifth pitch of the game. Fortunately, the prized 21-year-old was not injured.

His pride, though, may be another story. Severino gave up a massive two-run homer to Josh Donaldson into the bleachers in left-centerfield to give Toronto a 2-0 lead. After a strikeout of Jose Bautista, he served up a double to Edwin Encarnacion and an RBI single to Troy Tulowitzki, with Encarnacion sliding home just ahead of the throw from leftfielder Brett Gardner.

Justin Smoak, who had a huge grand slam against Ivan Nova when the Blue Jays swept a three-game series here in August, smacked a two-run homer to right to make it 5-0.

Severino, who struck out four in the first two innings, lost his control in the third. He walked Encarnacion and threw a wild pitch before walking Smoak with one out. Martin (3-for-5, four RBIs) singled for the sixth run on Severino's 71st and final pitch, 41 of which were strikes.

Joe Girardi said before the game that he didn't think the moment was too big for Severino. Perhaps it was just an off night, or perhaps having his start rained out on Thursday affected him. Whatever it was, he was gone after 21/3 innings in his first poor outing as a big-leaguer. He allowed six runs, six hits and three walks and his ERA went from 2.04 to 3.35.

Didi Gregorius had four RBIs with an RBI single off David Price (15-5, 2.46) and a three-run homer off LaTroy Hawkins. Beginning July 23, he is hitting .335 (54-for-161) with five homers and 31 RBIs in 46 games.

Encarnacion also homered for the Blue Jays, who lead the majors with 197 home runs -- 38 by Donaldson, 33 by Bautista, 31 by Encarnacion, 19 by Martin and 15 by Smoak.