Jake Peavy will pitch Sunday, but not in a Red Sox uniform. He'll be 3,000 miles west, on the mound in San Francisco.
Peavy was scheduled to start for Boston on Sunday in the finale of a three-game set against the Rays, but the club dealt him to the Giants on Saturday morning for a pair of pitching prospects -- Edwin Escobar and Heath Hembree. Starting in Peavy's place for the Red Sox will be 24-year-old Allen Webster, who will take on Tampa Bay's Chris Archer, as the Rays look to win their 10th consecutive game.
"[Peavy] was a guy we were willing to listen on simply because as we looked at the team, we felt like there was some opportunity and value in giving some innings to one of the younger starters, and we thought that we could be just as competitive as a team in doing that," Red Sox general manager Ben Cherington said. "And we knew that there would be enough interest in Jake to possibly get something back that we like and would help us down the road. He was one player on the team that we were willing to talk about earlier, and it just so happened that it came together this week."
Webster, Boston's No. 2 prospect, was roughed up in eight games (seven starts) last season, allowing 29 earned runs in 30 1/3 innings. He had a 1.81 WHIP and a 1.28 K/BB ratio. This season with Triple-A Pawtucket, he has a 3.10 ERA and opponents are hitting .234 against him.
"He has been able to maintain the overall command of stuff more than a year ago," Red Sox manager John Farrell said. "And he's gotten another 20-plus starts under his belt at the Triple-A level, which when you take back last year, his year at Triple-A was a very good one for us. He's in the process of transitioning to our level here."
Archer has been solid for the Rays this season, especially at home. He's posted a 3.19 ERA, a 1.23 WHIP and a 2.84 K/BB ratio at Tropicana Field.
His last two starts at the Trop haven't gone as well, though. He's given up nine earned runs in his last 12 innings at home, including five runs in as many frames against Toronto on July 11.
In his only start against the Red Sox this season, Archer didn't fare well. He allowed five runs on three hits and five walks over 4 2/3 innings on May 1.
All in all, however, Archer has been steady in 2014. Rays manager Joe Maddon credits improved fastball command for that success.
"It makes the difference," Archer said. "There's a correlation between my bases on balls and the runs I give up over the course of a season. Nobody probably looks at it like that, but I do. Because they're free passes. Too many pitches, which doesn't allow you to get into the seventh, eighth, ninth inning. So it's a key factor for me."
Red Sox: Deadline focus on 2015
Entering Saturday, Fangraphs.com gave the Red Sox just a 4 percent chance of making the playoffs. A 13-game stretch against only American League East opponents hasn't gone well, either.
Cherington said no other deals are imminent, but anything the club does between now and Thursday's non-waiver Trade Deadline will be with an eye on April 2015.
"We have to be mindful of what that means with where we are, what the math says about our chances, and we have to act accordingly," Cherington said. "Whatever we do between now and then will be geared toward putting ourselves in the best possible position as quickly as possible."
Cherington said the club is listening to offers, but there's nothing close to getting done right now. That would include a deal involving Jon Lester, who is set to become a free agent at season's end.
Rays: Oviedo designated for assignment
To make room for Saturday starter Jeremy Hellickson, the Rays designated righty Juan Carlos Oviedo for assignment.
Hellickson underwent elbow surgery in January and made his first start of the year prior to the All-Star break. The club wanted him to continue throwing, so he was sent to Class A Advanced Charlotte before returning Saturday.
The 32-year-old Oviedo had a 3.69 ERA and 26 strikeouts in 31 2/3 innings for Tampa Bay this season.
"He's gonna pitch for somebody else," Maddon said. "And given the opportunity, he has a chance to pitch really well during the rest of this season. There's nothing wrong with him at all, except that he just needs more opportunity, I think. Probably the only negative with him would be command overall, but stuff-wise, his stuff was good."
• Rays reliever Joel Peralta made a rehab appearance for Charlotte on Saturday. He allowed one hit in a scoreless inning.
Peralta (illness) is eligible to come off the disabled list on Monday. It's the first time he's been on the shelf in his 10-year career.
• Red Sox first baseman/outfielder Mike Carp has reportedly requested a trade from the organization. He wants to play more regularly and has seen just 95 plate appearances this season.
Steven Petrella is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.