Vargas has pitched solidly through his first four starts of 2012, going 3-1 with a 3.45 ERA. He's on a personal two-game winning streak and credits much of his success to catcher Miguel Olivo for helping him keep opponents off balance.
"Me and Miggy have been on the same page and have been executing for the most part," Vargas said. "Obviously there have been pitches that have been mis-hit that could have been hits in other situations, but for the most part I've been able to execute and get things done."
Vargas and Olivo will once again need to be on the same page Sunday, as Vargas has historically struggled against the Blue Jays. The left-hander is 0-2 with a 7.52 ERA in four career starts against Toronto.
The Blue Jays look to take the rubber game of the three-game series behind the right arm of 22-year-old Henderson Alvarez. Toronto has yet to win any of Alvarez's four starts this year, but that hasn't been due to any fault of the righty.
Alvarez has tossed three quality starts, including allowing just two runs in seven innings in a 2-1 loss to Baltimore his last time out. Those results have been nothing new for Alvarez and the Blue Jays, as Toronto has won only one of Alvarez's 14 career outings despite the right-hander tossing nine quality starts.
"I just go out knowing that I have to do my part," Alvarez said after his last outing. "I feel like I did my part, it's a team game and whatever happens after that is out of my hands."
Mariners: Montero driving in runs
Rookie Jesus Montero has 12 RBIs this month, which is tied with Kenji Johjima (2006) and Ruppert Jones (1977) for most by a Mariners rookie in April since 1986. The only other rookies to drive in more runs than those three are Alvin Davis (17 in 1984), Jim Maler (16 in 1982), Danny Tartabull (16 in 1986) and Juan Bernhardt (13 in 1977).
Only 19 of the Mariners' 90 runs have come from the seventh inning on.
Reliever Lucas Luetge has not allowed an earned run in his first nine appearances spanning 5 2/3 innings.
Blue Jays: Bautista overswinging
Jose Bautista went 1-for-4 with a double Saturday, but still is hitting only .187 this season. Blue Jays manager John Farrell said before Saturday's game he believes Bautista might be pressing at the plate.
"I think that can come from trying to do a little bit too much, overswinging the bat at times," Farrell said. "That's why you see a lot of pitches that he typically squares up, he's fouling off and at times looks like he's overswinging the bat."
Alvarez made his second career start against the Mariners in 2011, taking a no-decision after allowing four runs on six hits in five innings.
Toronto is the only American League team Mariners outfielder Ichiro Suzuki has not homered against.