TORONTO (AP) -- Rookie Tony Armas Jr. is making a name for himself.

Armas, the 22-year-old son of former big league outfielder Tony Armas, allowed four hits in seven innings and Vladimir Guerrero homered as the Montreal Expos defeated the Toronto Blue Jays 11-2 Saturday.

"It was a very impressive presentation. He has a fearless look to him," Montreal manager Felipe Alou said. "He grew up around major leaguers so he doesn't shy away from them."

The Expos ended their three-game losing streak and improved to 5-10 against their Canadian rival.

Armas, traded from Boston along with Carl Pavano in the deal for Pedro Martinez in 1997, won his second straight start.

"Anytime you trade Pedro for a Class A guy like Armas and Pavano, who was in Triple-A, and known to have arm problems, you take some heat," Alou said. "But now it is our time to enjoy."

Armas (2-3) has a 2.29 ERA since being promoted from Triple-A on May 13. He allowed one run, struck out three and walked two.

"Usually kids his age are nervous, but he's mature," Alou said.

Armas said he's not intimidated by big league hitters.

"I'm just focused on making my pitches," said Armas, who said he learned a lot growing up around major leaguers. "It was kind of tough because I never thought I would be a baseball player until late.

"I stayed away from baseball for a while when I was young. I have to thank my dad because he never pressured me to play, so I just grew to love it."

Carlos Delgado hit an RBI double for Toronto in the fourth. Armas escaped a bases-loaded jam in the seventh by getting Alex Gonzalez to line out sharply to second baseman Jose Vidro.

"Tony's got a very good arm. He kept us off balance," Toronto catcher Alberto Castillo said.

Montreal took a 4-0 lead after four batters. Kelvim Escobar (5-7) walked Wilton Guerrero to start the game, Vidro followed with an RBI double, Rondell White singled home a run and Vladimir Guerrero hit a two-run homer.

After being brushed back on the first pitch, Guerrero hit the third pitch for a towering homer, his 19th, into the second deck. The ball landed in the vicinity of a fan, who held up a sign that read "Guerrero for 2000 MVP."

The Expos took a 5-0 lead in the second on Vidro's RBI single. Montreal scored two runs in the sixth on Trace Coquillette's sacrifice fly and Peter Bergeron's RBI double.

Escobar allowed seven runs on eight hits in 5 2/3 innings.

"He overthrew a little bit," Castillo said. "We'll see what happens after he works on his mechanics."

Tony Batista hit a solo homer in the Toronto ninth off Steve Kline.

Game notes
Armas has pitched five innings or more in each of his six starts. ... The Expos placed RHP T.J. Tucker on the 15-day disabled list with a strained right elbow. ... Tony Armas Sr. played 14 years with Pittsburgh, Oakland, Boston and California. ... Delgado has 61 RBI in 63 games.