OAKLAND -- The Blue Jays will recall right-hander Joel Carreno prior to Friday night's game against Oakland.

The 24-year-old will fill the void left on the club's 25-man roster following the departure of Brad Mills, who was optioned to Triple-A on Thursday.

Carreno made 23 starts this season for Double-A New Hampshire, but will be used exclusively out of the bullpen in Toronto.

"He has an above-average slider," Blue Jays manager John Farrell said. "His velocity has been a tick above average -- he's in that 91-93-mph [range].

"The one thing that he showed in Spring Training, much like Henderson [Alvarez] and Luis [Perez] -- they come to this level and [have] not been intimidated. He had very good mound presence in Spring Training, and we're looking forward to seeing the same."

Carreno posted a 7-9 record with a 3.41 ERA in 134 2/3 innings this year. He struck out 152 with 68 walks in his first season above Class A.

Farrell said the club will ease the Dominican native into his new role because of his lack of experience in relief. Carreno has made just one appearance this season out of the bullpen, but pitched exclusively in that role during Spring Training.

"We know there's going to be a little bit of a transition," Farrell said. "We'll finish off an inning with a guy that has been a reliever ... just to buy enough time to make sure a starter coming into the bullpen has ample time to get loose."

Mills optioned to Triple-A

OAKLAND -- The Blue Jays optioned left-hander Brad Mills to Triple-A on Thursday afternoon, which paves the way for reliever Luis Perez to transition into the starting rotation.

Mills made four starts in Toronto, and posted an 8.35 ERA in 18 1/3 innings. The Arizona native really struggled during his past two outings with the club, allowing 12 earned runs in just six innings.

The 26-year-old's fastball typically tops out around 86-87 mph, and that lack of high velocity means Mills has to rely on pinpoint command. That's something he was unable to do during his third stint in the big leagues.

"When that isn't quite there, that's when things can unravel on him a little bit," manager John Farrell said. "But that wasn't the sole reason behind this move. Certainly, it factored into it. But what we have seen out of Luis, that's [why] we're taking this next step."

The decision came as a bit of a surprise, because Farrell stated on Wednesday that Mills was going to start on Sunday in Oakland. There were additional internal conversations about Perez later that night and again on Thursday, which prompted the team to reverse course.

Perez came on in relief of Mills during Tuesday night's game in Seattle. He allowed just one run in four innings en route to his second win of the season.

The Dominican native has posted a 3.71 ERA in 43 2/3 innings out of Toronto's bullpen this season. Perez has struck out 37, while walking just 15 -- and proved effective in the long-relief role.

Perez came up through the Minor Leagues as a starting pitcher, and his manager felt like he deserved an opportunity to perform in that role at the big league level.

"Just felt like the way Luis has thrown, this is a chance to see him in that role," Farrell said. "We bounced that idea back and forth throughout the course of this year. ... This provides that opportunity to take a look at him as a starter."

Morrow reaches out to Wells via Twitter

OAKLAND -- Brandon Morrow reached out to outfielder Casper Wells on Twitter following a scary incident on Wednesday night in Seattle.

Morrow threw a 97-mph fastball up and in to Wells during the sixth inning of Toronto's 5-1 win. The ball hit the tip of Wells' nose. But an inch or two in the other direction could have caused massive damage to the Michigan native.

Toronto's right-hander went online to ensure there was no hard feelings between the two players.

"Casper, sorry about the pitch that got away tonight," wrote Morrow, a former Mariner. "I'm glad it didn't get you too bad. Enjoy Seattle, it's a great city."

It didn't take long for Wells to respond and officially bury the hatchet.

"No worries man," Wells wrote. "Just grazed the schnaz a little bit, nothing serious. And Seattle is amazing."

The incident could have been much worse, but Wells was able to escape without a major injury. Following the incident, Morrow watched from the mound as Wells received medical attention.

After the game, Morrow felt nothing but relief that the reports indicated Wells was going to be fine.

"I couldn't tell live where it exactly got him, and the way he reacted I was worried about it," Morrow said. "But I heard it just tipped his nose and the X-rays are negative, so I'm glad he's all right."

Worth noting

• Shortstop prospect Adeiny Hechavarria appears to be adjusting well to life at Triple-A. The 22-year-old entered play on Thursday night hitting .560 (14-for-25), with three doubles and three walks in six games since being promoted from Double-A.

• Outfielder Travis Snider is batting .424 (14-for-33), with two home runs and 13 RBIs in nine games, since being optioned to Triple-A Las Vegas. The 23-year-old also has a double and four walks during that span.