The Rox are rollin.’ And playing like legit playoff contenders.

Riding long-distance home runs from Nolan Arenado and Chris Iannetta, as well as an excellent start from right-hander Antonio Senzatela, the Rockies beat Toronto 5-1 on Sunday afternoon at Coors Field to polish off a three-game sweep.

The Rockies extended their winning streak to a season-high eight games, creating history in the process. They finished the 10-game homestand with a 9-1 record, tying the 2009 club (Sept. 1-10) for their best such run at Coors.

“This is what I thought we could do, absolutely,” said Arenado, who extended his hitting streak to 13 games, during which he batted .481 (25-for-52) with five home runs, four doubles and 17 RBIs. “The way ‘Senza’ pitched today, and with (German) Marquez and (Jon) Gray pitching (well), we thought they would keep us in ballgames.

“And I knew our offense would find ways to score runs. And I knew we would play good defense, so I knew we had this capability.”

Colorado has posted a 28-15 record since April 14, the second-best record in the National League, trailing only the Dodgers, who’ve gone 32-9 over that stretch and lead the Rockies by nine games in the NL West.

The hapless Blue Jays, meanwhile, lost their sixth consecutive game and have dropped 10 of their last 11. So the next test will be a more legitimate one for the Rockies, who have a day off Monday before beginning a three-game series at the Chicago Cubs on Tuesday.

“We have to keep it going. That’s the challenge,” manager Bud Black said.

Senzatela, displaying staying power and the ability to keep cool with traffic jamming the bases, pitched six innings, allowing one run on four hits, striking out four and walking three.

Senzatela’s first inning was rocky, featuring singles by Eric Sogard and Vladimir Guerrero, a fielder’s choice by Justin Smoak to drive in a run and a walk by Cavan Biggio to loaded the bases. But Senzatela escaped, allowing only that one run. He induced Brandon Drury to chop the ball to first baseman Daniel Murphy, who threw home for the force out, and then Freddy Galvis flew out to center for the final out.

“I just told myself to breathe and concentrate on making pitches,” said Senzatela, who recorded his fourth quality start of the season.

Said Black: “That inning could have been a lot worse. But he toed the line, cinched his belt and got it done.”

Colorado tied the game 1-1 in bottom of the frame on Daniel Murphy’s RBI single and took a 2-1 lead in the second on David Dahl’s run-scoring double.

Iannetta belted an RBI double in the third inning, but he was just getting warmed up. In the sixth, he rocketed a leadoff, 476-foot solo homer to the left-field concourse off Aaron Sanchez. It was the third-longest homer in the majors this year behind the Rangers’ Nomar Mazara’s 482-foot blast on opening day and another 482-foot shot from the Diamondbacks’ Ketel Marte that came Sunday.

“I just took a good swing and put the barrel to the ball,” Iannetta said. “It was definitely a lot of fun.”

Arenado’s 16th home run came in the seventh inning, a 432-foot blast off Justin Shafer to put Colorado ahead 5-1.