SEATTLE -- Blue Jays center fielder Rajai Davis is set to go on the 15-day disabled list Tuesday with soreness in his right ankle.

Davis was attempting to play through the injury, but the club eventually decided an extended period of rest was required.

"We're just trying to get ahead of it as best we can," said Blue Jays manager John Farrell. "His game is centered around speed and we've got to make sure he has ample time to get it back to 100 percent."

Davis initially twisted his ankle during a rundown between first and second base on April 1st. He sat out the following two games but returned to play in the three-game series against Oakland.

The 30-year-old Davis played in a 14-inning game on Saturday night against the Angels, followed by an early afternoon game the next day. The added workload took its toll.

"To his credit, he tried to go on it as best he could," Farrell said. "We felt like we were making headway, but I know just the sheer volume of the 14-inning game flared it up a little bit -- quick turnaround, he's right back out there again.

"What's best for him [is] to make sure that we address this now and not that it lingers on for an extended period of time like it has for the past week."

Davis led the Blue Jays in home runs during Spring Training but had difficulty driving the ball after rolling his ankle. He was batting .156 with one extra-base hit in seven games this season.

Toronto will recall utilityman Mike McCoy to take Davis' spot on the 25-man active roster.

Recently activated Corey Patterson got the start in center field Monday night against Seattle, and he is expected to assume that role until Davis makes his return.

Patterson back from two-plus-week absence

SEATTLE -- Corey Patterson, who had been out since the final week of Spring Training after being hit in the head by a fastball from Boston's Daniel Bard, made his season debut for the Blue Jays in Monday's 8-7 loss to the Mariners and belted a two-run homer.

The veteran outfielder spent the past two-plus weeks in Florida working his way back from the head contusion. Patterson said he didn't have any trouble getting back into the batter's box following the scary incident.

"It was fine, I had no problems," said Patterson, who went 5-for-15 in his rehab. "Before my first game I played a simulated game too, so I probably got six, seven at-bats, and there wasn't any hesitation.

"It was fine, and if I felt any uncertainty I would let these guys know, but everything has been great."

Patterson's return came at just the right time for the Blue Jays, who are placing center fielder Rajai Davis on the 15-day disabled list Tuesday with a right ankle injury.

The 31-year-old Patterson originally expected to return to a reserve role, but on Monday night against Seattle, he found himself starting in center field and batting second.

"You hate to see people play and get opportunities because of that, but it happens in this game," Patterson said. "Rajai's going to work to get his ankle better and he'll be a great addition when he comes back. But we have a great group, and whoever John ([Farrell] puts in there I'm sure will get the job done."

Patterson hit to a .253 clip with 205 stolen bases and 522 runs scored during his 11-year career. He expects to bring a similar skill set to the one Davis would have provided at the top of Toronto's batting order.

"The name of my game is to score runs," Patterson said. "They talked about this team being more of a stolen-base threat this year, and we brought some guys to do that.

"That's what I'm looking to do, I don't consider myself a home-run hitter. So if I can just get on and help manufacture some runs, that's what I'm going to do."

Morrow set to make second rehab start

SEATTLE -- Brandon Morrow will make his second rehab start for Class A Dunedin on Tuesday.

Morrow is on the 15-day disabled list with inflammation in his right elbow. Blue Jays manager John Farrell said Morrow is expected to throw 60-65 pitches and likely will require one more outing before making his return to Toronto.

"I think it's prudent to take a building-block approach with him," said Farrell, who added the club wants to gradually increase Morrow's pitch count. "We want him back, but we want him back as we all know him and what he has shown throughout the course of last year."

Right-hander Frank Francisco is also rehabbing from injury with Dunedin. The 31-year-old has allowed six runs on four hits and three walks over 1 2/3 innings.

Francisco originally expected to require a total of three rehab appearances before making a return, but that no longer appears to be the case. He'll likely make at least three more outings as he continues to work on increasing the velocity on his pitches.

"The feeling is that he needs more reps, more innings on the mound," Farrell said. "He's not pitching consistently at that 92-94 mph range with a chance to go above that. He's at 89-90, and he'll touch 92-93, and that's why that repetition is needed."