BALTIMORE (AP) -- Jo-Jo Reyes was eager to show the Toronto Blue Jays they made a mistake by cutting him loose in early August. Instead, the left-hander put on a performance that justified their decision.

Reyes didn't get out of the third inning, and the Baltimore Orioles managed only three hits over eight innings against rookie Henderson Alvarez in a 13-0 loss Wednesday night.

Reyes (7-11) gave up seven runs and eight hits in 2 2/3 innings, matching his shortest start of the season. He yielded two homers, three singles and a double in a six-run third that sent Baltimore on its way to its worst shutout loss since an identical defeat against the White Sox on July 4, 2006.

"The way I left the ball up today, no matter what team was out there I was going to get hit hard," said Reyes, who was claimed off waivers from Toronto on Aug. 2. "Anytime you leave the ball up in this league you're going to get hit, and today showed it."

Asked if Reyes' poor outing could be attributed to being too eager to face the Jays, Orioles manager Buck Showalter replied, "He's had some outings where he's pitched very similar to the way he pitched tonight and it wasn't against Toronto, so I'm not going to put a whole lot of credence in that."

Reyes wasn't the only Orioles pitcher to struggle. Brad Bergesen gave up a homer to Edwin Encarnacion and Jose Bautista hit his 39th of the season off Troy Patton.

"We made a lot of bad pitches. When you give up 20 hits ... " Showalter said.

The 21-year-old Alvarez (1-2) faced the minimum 21 batters through seven innings. Ryan Adams lined a clean single to center in the third and was immediately wiped out by a double play. Matt Angle reached on an error in the seventh before Jake Fox bounced into a double play.

In the eighth, Vladimir Guerrero and Robert Andino singled before Alvarez worked out of trouble.

The right-hander struck out five and walked none. He recorded only two outs on fly balls.

"He just had a really good sink to his ball tonight," said Adam Jones, who went 0 for 4. "He really wasn't throwing too many off-speed pitches. He just had a lot of sink and was hitting some spots, and it was tough to square up."

At 21 years and 135 days, Alvarez is the youngest Toronto pitcher to earn a victory since Kelvim Escobar in 1997 and the youngest starter to win since Phil Huffman in 1979.

"He had composure, aggressiveness," said Toronto bench coach Don Wakamatsu, subbing for ailing manager John Farrell. "He pitched a phenomenal game and I think it breathes a little life into the offense."

The Blue Jays' 20 hits tied a season high. Encarnacion went 4 for 5 with a homer and two doubles, and Yunel Escobar and Eric Thames also had four hits apiece. Bautista and Kelly Johnson each contributed three RBIs.

Toronto used doubles by Encarnacion and rookie Brett Lawrie to go up 1-0 in the second. That only served as a precursor for the offensive fireworks to follow.

In the third, Thames doubled in a run and scored on a single by Adam Lind. After Encarnacion singled, Johnson hit his first homer since being traded to Toronto from Arizona on Aug. 23. Jose Molina capped the uprising with a solo shot. Toronto made it 11-0 in the fourth. After Thames doubled in a run and Bautista hit a run-scoring grounder, Encarnacion homered. Bautista connected in the sixth.

Baltimore rookie Zach Phillips made his major league debut in the eighth and worked out of a bases-loaded jam.

(Copyright 2011 by The Associated Press. All Rights Reserved.)