TORONTO -- Reliever Jason Frasor, who has been out since mid-July with right forearm inflammation, rejoined the Blue Jays on Sunday.

Frasor made his second rehab start for Class A Advanced Dunedin on Saturday, throwing a clean inning and striking out a pair.

"Very good," manager John Farrell said when asked how Frasor felt. "[He's] available [on Monday] at the earliest."

The right-hander threw two innings with Dunedin during his rehab assignment. He didn't allow a hit or walk and struck out four batters.

Frasor, who hasn't pitched since a July 16 outing against the Yankees, had been feeling discomfort in his throwing arm for a while leading up to his stint on the disabled list.

The veteran has appeared in 42 games with the Blue Jays this season, and sports a 4.00 ERA with 13 holds and a career-high 11.25 strikeouts per nine innings.

Frasor, who has spent all but 20 games of his nine-year career with the Blue Jays, is set to become a free agent at season's end.

Arencibia, Lawrie continue to mend

TORONTO -- Catcher J.P. Arencibia continues to progress in his rehab, and the Blue Jays are still eyeing Sept. 10 as the possible day he could return.

"That's the target date, and it could possibly be before then," manager John Farrell said.

Arencibia, out since July 25 with a fractured right hand, has been catching bullpens, taking batting practice and taking part in all other baseball activities.

He will have to amp up his batting-practice sessions and build a tolerance to hit before joining the club. Arencibia is likely to go on a rehab assignment with one of Toronto's Minor League affiliates for their postseason run.

Arencibia is batting .242 with 16 homers, 50 RBIs and a .745 OPS over 81 games this season.

Brett Lawrie, meanwhile, has been swinging a bat for the past few days. But there is currently no timetable for his return.

Farrell said Lawrie, who has been out since Aug. 3 with a strained oblique, has been taking light, controlled batting practice over the weekend and has been hitting off a tee.

With the Minor League season coming to a close, Lawrie may not be able to participate in any rehab games before joining the Blue Jays. If that's the case, the team will try to have him play in a simulated setting or send him to the Instructional League, which starts Sept. 18-20, according to Farrell.

"That could be also another alternative, if we feel it's either pushing it too much before Oct. 3 [Toronto's last game of the season] here, or we don't want to ramp him right up into Major League games here," Farrell said.

The team won't push Lawrie to return, as they want the 22-year-old to go into the offseason with his oblique fully healed.

Lawrie is batting .282 with nine homers, 40 RBIs, 13 stolen bases and a .742 OPS over 100 games.

Blue Jays planning to use six-man rotation

TORONTO -- The Blue Jays will turn to a six-man rotation to end the season, but it has yet to be determined when that will take place.

After Sunday's game against the Rays, the Blue Jays play the Orioles for three, have an off-day, then have another off-day the following Monday after a three-game set with the Red Sox next weekend.

Since the off-days will give each member of the rotation an extra day of rest, the team isn't likely to use a sixth man until the following week.

Toronto has one more day off on Sept. 17 before playing 16 consecutive days to end the year, including a doubleheader against the Orioles on Sept. 24.

The six-man rotation will consist of Brandon Morrow, Ricky Romero, Henderson Alvarez, Carlos Villanueva, J.A. Happ and Aaron Laffey.

Brett Cecil, who will likely rejoin the team on Tuesday, will pitch out of the bullpen upon his return.