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

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

"It was command," Joe Girardi said of Severino. "He didn't really have any command of his fastball tonight. He struggled with command of his other pitches and they made him pay."

Asked if he was concerned about Severino after the rookie's worst big-league outing, Brian McCann said: "Not at all. Not one bit. We know what he's made of. We know what he's capable of doing. You have games like this. You turn the page."

At least the Yankees get to turn the page quickly with a doubleheader beginning at 1 p.m. Saturday. But Friday night was all about failed tests for them.

advertisement | advertise on newsday

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.

Alex Rodriguez, who will be honored Sunday for his 3,000th hit, struck out four times and heard the rare sound of home boos. But things went sour early for the Yankees as a whole.

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. He gave up a long two-run homer by Josh Donaldson into the bleachers in left-center for a 2-0 Toronto lead.

After Jose Bautista struck out, Severino served up a double by Edwin Encarnacion and an RBI single by Troy Tulowitzki. Justin Smoak's two-run homer to right made it 5-0.

Yankees videos

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 to center for Toronto's sixth run on Severino's 71st and final pitch. Only 41 were strikes.

Girardi said he didn't think the moment was too big for Severino. 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 rose from 2.04 to 3.35.

Severino said he was not hurt when he slipped off the mound. He did have a bandage on his right shin after the game, the result of some sort of pregame accident at home in which he said he kicked himself. He said that didn't affect his pitching either. He just didn't pitch well.

"You have to forget about that and keep going," he said.

Encarnacion hit a two-run homer off Chris Martin in the fourth. Russell Martin hit a solo homer off Andrew Bailey in the fifth and a two-run shot off Chasen Shreve in the seventh.

advertisement | advertise on newsday

"For the most part, we were up in the zone all night," Girardi said, "and that's why we got hit so hard."

Didi Gregorius had four RBIs, contributing an RBI single off David Price (15-5, 2.46) and a three-run homer off LaTroy Hawkins that brought the Yankees within 9-5 in the sixth. Beginning July 23, he is hitting .335 (54-for-161) with five homers and 31 RBIs in 46 games.

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.

The Blue Jays lead the majors with 197 home runs -- 38 by Donaldson, 33 by Bautista, 31 by Encarnacion, 19 by Martin and 15 by Smoak. The Yankees have hit 188.