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8/27/2014 10:21 P.M. ET

Struggling Santos designated for assignment

TORONTO -- Sergio Santos' season took yet another unfortunate turn on Wednesday afternoon when he was designated for assignment for the second time this year.

Santos was once considered the closer of the future in Toronto, but he has since fallen on tough times. Santos struggled through two injury-plagued seasons before seeing his performance on the mound fall apart amidst sporadic use.

The hard throwing righty is now eligible to be claimed by any other team, but if he clears waivers, there's still a chance Santos would remain in the organization.

"He threw some strikes, but they weren't good strikes," manager John Gibbons said. "At the start of the season, he was pretty good for us. Last September, he was really good. But other than that, he's had a tough go. Relievers have tough lives. We needed a guy and he has been scuffling."

Even if Santos clears waivers, he's likely thrown his last pitch for the Blue Jays. There's a $6 million club option on his contract for next season that is all but guaranteed of being bought out at the end of the year for $750,000.

Right-hander Chad Jenkins was recalled from Triple-A Buffalo to take Santos' spot on the 25-man roster. Jenkins has worked exclusively as a reliever for Toronto this year and has a 2.56 ERA in 21 appearances.

Santos, 31, is 7-12 with a 3.89 ERA in the Major Leagues. The right-hander posted 30 saves in 2011 with the White Sox and was acquired by the Blue Jays in a trade for Nestor Molina the following offseason. Santos has pitched in just 61 games for Toronto over three seasons.

Morrow tosses scoreless frame in rehab outing

TORONTO -- Right-hander Brandon Morrow began his rehab assignment with Class A Dunedin on Wednesday night by tossing one scoreless inning.

Morrow entered out of the bullpen and retired all three batters he faced. He struck out one and got two other batters to fly out in Dunedin's 8-2 loss to Daytona.

Toronto has yet to announce a timetable for Morrow's return, but he's expected back at some point in September. He hasn't pitched for the Blue Jays since he tore a tendon sheath in his right index finger on May 2 in Pittsburgh.

Morrow has spent his entire career in a Blue Jays uniform as a starter, but when he returns, it will be as a reliever. There isn't enough time remaining in the season for Morrow to build up enough stamina to start.

Rasmus remains sidelined by flu-like symptoms

TORONTO -- Colby Rasmus was held out of the Blue Jays' lineup on Wednesday night for the second consecutive game because of flu-like symptoms.

Rasmus was a late scratch on Tuesday night, but he was never really expected to play the following day. Fourth outfielder Kevin Pillar took Rasmus' spot in center field for the series finale vs. Boston.

"Sick enough that he can't play," manager John Gibbons said. "It hit him yesterday before the game and today he's feeling worse."

Rasmus is batting .223 with 16 homers and 37 RBIs in 93 games this season. He's eligible for free agency at the end of the year and isn't expected to return to Toronto.

Gregor Chisholm is a reporter for MLB.com. Read his blog, North of the Border, and follow him on Twitter @gregorMLB. This story was not subject to the approval of Major League Baseball or its clubs.