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6/19/2014 10:07 P.M. ET

Doubront to come off DL, start Friday against A's

OAKLAND -- Left-hander Felix Doubront will start Friday for the Red Sox in place of suspended righty Brandon Workman, manager John Farrell confirmed before Thursday's series opener against the A's.

On Sunday, Doubront made his second Minor League rehab start with Pawtucket since being placed on the 15-day disabled list May 21 with a left shoulder strain. He struck out 10 in five no-hit innings.

"His last start was much improved in terms of overall stuff," said Farrell. "There was increased intensity, increased velocity, increased action to his pitches that are going to be required here, and he gets the ball tomorrow."

Doubront was with the team in Oakland on Thursday and will face recent A's acquisition Brad Mills on Friday. The 26-year-old Doubront went 2-4 with a 5.12 ERA in nine starts before going on the DL.

Workman, who was disciplined for throwing a pitch behind Evan Longoria on May 30, began serving his six-game suspension Wednesday after an appeal with Major League Baseball led to no reduction of the penalty.

Since replacing Doubront in the rotation, Workman is 1-0 with a 3.21 ERA in five starts. He will be eligible to return Tuesday.

Buchholz's next start to come at big league level

OAKLAND -- Clay Buchholz threw six shutout innings in his second rehab start with Triple-A Pawtucket on Thursday, and manager John Farrell expects the right-hander's next outing to be in the Majors.

Buchholz allowed just two hits and fanned five while throwing 87 pitches, 51 for strikes.

"His changeup feel and execution was much improved, and the shape to his overall pitches was consistent, particularly with the way he threw his changeup today," said Farrell. "His final start was one that I think we all felt was needed, but he went about it the right way and comes back with some momentum."

Buchholz flew to Oakland after Thursday's start to rejoin the big league team. His Red Sox return will likely come next week, though Farrell is not yet sure what day.

"We've got a number of things that are kind of moving parts, and I think as we get through this weekend, those decisions will become more clear," Farrell said.

Buchholz, who is 2-4 with a 7.02 ERA in 10 starts this season, went on the disabled list May 28 with a hyperextended left knee.

Worth noting

• Shane Victorino (right hamstring strain) was scratched from Pawtucket's game Thursday with "overall stiffness," according to Farrell. The outfielder will sit again on Friday and hopes to return to the PawSox's lineup Saturday.

Despite the setback, Farrell still believes Victorino could rejoin the Red Sox during their upcoming series in Seattle.

• Will Middlebrooks had a scheduled day off Thursday in his Triple-A rehab assignment, as he continues to recover from a fractured right index finger.

• Farrell gave David Ortiz a routine day off on Thursday. He has started 67 of Boston's 73 games this season.

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