Jon Lester has been one of the few bright spots for the Red Sox this season. Last year's World Series champions may sit at the bottom of the American League East, but that hasn't stopped Lester from dominating opponents as of the late.
The left-hander, who was just selected to his third All-Star Game, hasn't allowed an earned run over his last 16 innings. He's also turned in five consecutive quality starts, allowing just four earned runs in that span.
"I feel good. My fastball command has been pretty good, I feel like I've gotten the consistency back with my cutter, which has been helpful at times, just getting it in on righties," Lester said after his last start. "All in all, I'm moving the ball around pretty well. Keeping it down, keeping the ball on the ground."
Lester will look to salvage a 10-game homestand for the Red Sox in Thursday's series finale against the White Sox at Fenway Park. Even with a 5-4 walk-off win Wednesday night, Boston is just 2-7 on the homestand.
"We thought we could come home and build some momentum, but that just hasn't happened," said general manager Ben Cherington.
Meanwhile, White Sox left-hander Jose Quintana has been on a similar streak, throwing 15 2/3 scoreless innings, a stretch that dates back to June 24.
In his previous outing against the Mariners, Quintana allowed just four hits in 7 2/3 innings and matched a season high with 10 strikeouts.
Since allowing six earned runs in six innings to the Royals on June 13, Quintana has allowed three earned runs in 28 2/3 innings over his past four starts -- a 0.94 ERA.
Quintana will look to give Chicago its first four-game series win in Boston since September 1967.
White Sox: Beckham in slump
While Gordon Beckham continues to struggle at the plate, White Sox manager Robin Ventura is sticking by his second baseman.
After going 0-for-4 in Wednesday's game, Beckham is now 1-for-26 in his past six games.
"Just spinning off," said Ventura. "You can tell when he's going good, it's actually that ball into right-center. That's always been really a key sign for him, for me anyway, is to get it on a line to the right side.
"He was able to do that earlier in the year. Sometimes you lose it as a player and go through a tough stretch. To me, that ball is right there, is the one that when he's on, that's the one he's hitting, so hopefully that's a good sign for him."
Red Sox: Pierzynski designated for assignment
Boston cut ties with catcher A.J. Pierzynski on Wednesday, designating the catcher for assignment and purchasing the contract of No. 10 prospect Christian Vazquez.
The 37-year-old Pierzynski never really panned out for the Red Sox after he was signed as a free agent in December. He hit .254 in 72 games this season.
Vazquez got the start behind the plate for Wednesday's contest against the White Sox and went 0-or-3.
"It is an opportunity for us to invest in players that will be here beyond 2014 and while we may have other decisions that are forthcoming, we felt the place we were going to start with is behind the plate," Red Sox manager John Farrell said. "That brings Christian to us. He is a guy we are high on in his abilities as a defender. He can shut down the running game and he continues to develop as an offensive player."
• The Red Sox are 10-40 this season when an opponent scores first.
• The Red Sox have played an AL-high 35 games decided by one run this season. They are 16-19 in those contests.
• The White Sox are fifth in the AL with 28 multi-home run games.
Quinn Roberts is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.