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5/26/2014 8:44 P.M. ET

Cobb settling back into routine

TORONTO -- After a scoreless outing against the Athletics last week, it appears Alex Cobb has adjusted well in his return to the Rays after missing six weeks with a left oblique injury.

But he forgot all about getting back into a routine on the road.

"It's fun," said Cobb, who went 6 2/3 innings in his first start since April 12 on Thursday. "You forget about the long journeys on the plane, sitting on the busses, waiting for customs, getting to the hotel late, sleeping all day. It's a lot of fun, more fun than it sounds."

The 26-year-old righty is due to take the mound against the Blue Jays on Tuesday.

Oblique injuries have a reputation for being tricky, but Cobb said there are no lingering doubts in his mind about his recovery.

"There are never any thoughts other than pitching when I'm on the mound," said Cobb, who is 1-1 with a 1.40 ERA through four starts this season. "I think peace of mind comes from pitching [batting practices], rehab assignments, simulated games. That was the all peace of mind I needed to go into it worry-free, and the further away from the injury we get, the less it becomes an issue."

Rays manager Joe Maddon said having Cobb back in the rotation adds stability.

"He's that guy that shook us up a little bit [when he was out]" said Maddon. "We were missing him."

Guyer sent to DL with fractured left thumb

TORONTO -- The fractured left thumb Brandon Guyer sustained diving for a ball in the fifth inning of the Rays' win over the Red Sox on Sunday has landed him on the 15-day disabled list.

Guyer stayed in the game and later singled and scored in the seventh inning, as Tampa Bay beat Boston, 8-5, to extend their winning streak to four games.

Rays manager Joe Maddon said Guyer staying in the game ended up being key to the win.

"The part about that that's gotten lost is the fact that by him continuing to play, it permitted us to keep Desmond [Jennings] on the bench later in the game. We eventually pinch hit him for [David] DeJesus, which eventually led to that winning rally."

The timing of the injury is especially unfortunate for the 28-year-old, who appeared to have found his swing of late. Guyer hit .370 (10-for-27) with a home run and four RBIs in his past 10 games.

Maddon said the outfielder was discouraged to learn that his thumb was fractured following tests performed postgame Sunday, but the injury won't likely lead to an extended stay on the DL.

"He's really becoming a big league player right now," said Maddon. "This guy has faced a lot of adversity over the past couple of years, so it's not easy for him to accept this right now. He was pretty distraught after the game, and I don't blame him. But we're trying to encourage him and have him understand that he's really turning the corner."

Colome joins Rays in Toronto for one night

TORONTO -- Rays right-hander Alex Colome rejoined the team Monday after being reinstated from his 50-game suspension for testing positive for a performance-enhancing drug, and he pitched four innings in relief as the Rays lost to the Blue Jays, 10-5.

Colome, who was issued the suspension on March 24 as a member of Triple-A Durham, allowed three hits and two earned runs and was optioned back to Durham following the game.

A corresponding roster move will be made Tuesday, Rays manager Joe Maddon said.

"He did a great job and he really did help us get back in order for tomorrow," said Maddon.

The 25-year-old pitcher said prior to the game that he was grateful for the callup so quickly after being reinstated.

"I made a big mistake," Colome, who was 1-1 with a 2.25 ERA through three starts for the Rays in 2013, said through an interpreter. "I want everyone to know that I apologize to my teammates, the organization ... and everyone who has been by my side. I want to put it all behind me and do the best I can to help us win and move forward."

Despite the suspension and the layoff that came with it, Colome, who's ranked as the Rays' Rays' No. 5 prospect by MLB.com, said he feels physically ready to perform whatever duties are required of him, be it as a starter or in the bullpen.

"I feel good. I worked harder than I have in regular Spring Training, because I was able to isolate training, keep myself strong. ... I think I worked a lot to build my arm strength up. I feel good."

The promotion was made possible after Brandon Guyer went on the 15-day disabled list with a fractured left thumb, which he sustained in Sunday's 8-5 win over the Red Sox. Instead of bringing up a position player, the Rays chose a pitcher.

"We're challenged with pitching right now, just based on the length of our games," said Maddon pregame. "We needed someone that could provide length, or short, if that makes sense. We were not protected if this game [Monday] started off early with an injury, so we had to do something."

The timing of the callup was fortuitous, Maddon said, because Colome was due to start the same day in Triple-A, so he was fully stretched out and available.

Jamie Ross is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.