Chapman (elbow) is starting at third base and batting out of the cleanup spot against the Mets on Friday, Justice delos Santos of The San Jose Mercury News reports.

Chapman was lifted from Wednesday's game against Atlanta after being hit by a pitch in the left elbow. The good news for the Giants and the veteran third baseman is that X-rays came back negative, and he has been given the green light to play in Friday's series opener. Chapman has gone 7-for-22 (.318) with one triple, two home runs and seven RBI since the All-Star break.

The Mariners optioned Mastrobuoni to Triple-A Tacoma on Friday.

Mastrobuoni will lose his spot on the 26-man roster now that Josh Naylor (recently traded) has reported to the club. Mastrobuoni has slashed .252/.327/.293 with the Mariners and had recently been splitting time with Ben Williamson at third base.

Shaw isn't part of the starting lineup for Friday's game against the White Sox.

Shaw has been red hot coming out of the All-Star break, posting a six-game hit streak and going 9-for-19 (.474) with three homers. He'll get what appears to be a night off Friday to start off a three-game set against the White Sox. Vidal Brujan will play third base instead.

The Red Sox placed Mayer on the 10-day injured list Friday, retroactive to July 24, due to a sprained right wrist, Gabrielle Starr of the Boston Herald reports.

Mayer underwent an MRI on his wrist Thursday, and the evaluation determined he's dealing with a sprain. He'll require a stint on the injured list, opening up a spot on the 26-man roster for David Hamilton. Hamilton, Romy Gonzalez and Ceddanne Rafaela are the likeliest candidates to fill in for Mayer at second base.

The Yankees acquired McMahon from the Rockies on Friday in exchange for pitching prospects Griffin Herring and Josh Grosz, Mark Feinsand of MLB.com reports.

The Bronx Bombers will fill their lineup hole at third base by adding McMahon, who has spent his entire professional career with the Rockies since being selected in the second round of the 2013 First-Year Player Draft. The 30-year-old has clubbed 16 homers with 35 RBI, 42 runs and a .217/.314/.403 slash line through 100 games this season. McMahon also has two years and $32 million remaining on his contract after 2025.

Atlanta optioned Alvarez to Triple-A Gwinnett on Friday.

The 22-year-old has been up in the big leagues for the past couple weeks but will head back to Gwinnett due to Austin Riley (abdomen) returning from the injured list Friday. Alvarez received regular playing time at third base while Riley was out and went 6-for-30 (.200 average) with a double, two runs and nine strikeouts in eight games.

Atlanta reinstated Riley (abdomen) from the 10-day injured list Friday.

The third baseman was still feeling some discomfort in his lower abdomen earlier this week, but he's ready to rejoin the big-league roster Friday after spending two weeks on the injured list. Riley had a hot start to July prior to the injury, going 13-for-41 (.317 average) with five doubles, two homers, six RBI and five runs in 10 games.

Barger went 1-for-4 with a walk, a triple, two runs scored and two RBI in Thursday's win over the Tigers.

His seventh-inning blast into the right-center field gap off left-hander Dietrich Enns was the first triple of Barger's career. The 25-year-old has been locked in since the All-Star break, hitting safety in six of seven games while batting .385 (10-for-26) with three extra-base hits, five runs and six RBI. Barger still sits against tougher southpaw starting pitchers, but it's getting more and more difficult for manager John Schneider to leave him off the lineup card, even in same-handed matchups.

Clement went 2-for-4 with a three-run homer and an additional RBI during Thursday's 11-4 win over the Tigers.

Clement broke a 1-1 tie in the fourth inning with a three-run home run. The 29-year-old has hit just five homers on the season, but he does have 20 doubles and 31 RBI. He's maintained an everyday role all season, although he's had a tough July prior to Thursday's showing, slashing just .186/.205/.257 with four extra-base hits and five RBI.

Andujar isn't in the lineup for Thursday's game against the Astros.

Andujar will grab a seat on the bench Thursday after going 2-for-10 with four strikeouts during the Athletics' three-game set against the Rangers. While he rests, Gio Urshela will pick up a start at third base, and Carlos Cortes will cover right field.