TORONTO -- Rafael Soriano has been selected as the winner of the Major League Baseball Delivery Man of the Month Award for May, it was announced Wednesday.

This award recognizes the most outstanding relief pitcher during each month of the regular season as voted on by a panel from Major League Baseball.

Soriano did not allow a run in his 12 appearances during May, converting each of his nine save opportunities to tie for the American League lead in saves for the month.

Tuesday night, Soriano picked up his 15th save in 15 opportunites this season.

"To me, right now, I feel real comfortable," Soriano said.

When asked to describe what he has seen of Soriano this season, manager Joe Maddon said: "Very composed. Very calculated. Knows exactly what he wants to do. ... He's definitely a one-pitch-at-a-time guy."

DL decision on Bartlett coming by Friday

TORONTO -- Joe Maddon said Jason Bartlett (right hamstring strain) felt a little better Wednesday, but the Rays' manager said a decision needs to be made by game time Friday on whether to put his starting shortstop on the disabled list.

"Lateral movement was a little better, hitting still is not a problem," Maddon said. "It's the lateral [movement] on ground balls, when he goes to pick them up. There has been improvement, but we're definitely going to have to do something one way or the other by the time we get to Texas."

Maddon said he still views the decision as a 50-50 call.

"Going into the Texas series, we don't want to play with one person short," Maddon said. "So we'll make a determination if he's able to play at that point or if we need to bring somebody up."

Due to the flexibility of the players the Rays have, Maddon said if they do put Bartlett on the DL and call somebody up, it doesn't necessarily have to be an infielder.

"We've got great flexibility," Maddon said. "There are different ways to look at it -- a lot of different possibilities. It would primarily be -- 'How do we match up against these guys hitting wise?' Trying to score a couple of more runs."

Marcum forces heavy righty lineup

TORONTO -- Manager Joe Maddon started one of his most unique lineups of the season Wednesday night, with Willy Aybar hitting cleanup, Sean Rodriguez hitting fifth and Ben Zobrist -- playing first base instead of Carlos Pena -- hitting sixth.

The driving force behind the shaken-up lineup had more to do with who was pitching for Toronto, right-hander Shaun Marcum, than anything any of his hitters has been doing.

Left-handers are hitting just .166 against Marcum, while right-handers are hitting .280. So the lineup is full of right-handers.

"You look at their pitcher -- he's really difficult on left-handed hitters this year," Maddon said. "He's always been, but he's got a real awful, in a sense, reverse split. Lefties are doing nothing against him, righties are hitting him. ... Anyway, I just wanted to mess things up a little bit today and try to match up our hitter's strengths against this guy's."

As for the switch-hitters, would they bat right-handed against the right-hander? Maddon smiled at the question.

"They're switch-hitters and they'll go up there as they see fit," he said.

Shoppach, Joyce begin Durham stints

TORONTO -- Catcher Kelly Shoppach (right knee surgery) and outfielder Matt Joyce (right elbow strain) have begun their respective stints at Triple-A Durham and both played Tuesday night.

Shoppach had a single in four trips to the plate while serving as the Bulls' designated hitter, and Joyce had a double in four at-bats while playing right field.

Also at Durham, outfielder Justin Ruggiano had four stolen bases. Ruggiano is making his case to get some time with the Rays this season as he's hitting .301 with four home runs and 18 RBIs.

Of course, Jeremy Hellickson continues to raise the most eyes for Durham as the right-hander is 8-2 with a 2.49 ERA in 11 starts this season.