Muncy (oblique) went 1-for-4 with a two-run home run in Monday's 3-0 win over the Mariners.

Muncy played for the first time in over three months and made and instant impact with his seventh-inning homer off reliever Yimi Garcia. Muncy was able to play all nine innings at third base and should be the Dodgers' primary option there moving forward, though Enrique Hernandez could poach some starts at the hot corner versus southpaws. Over 41 contests this season, Muncy has 10 homers, 30 RBI, 25 runs scored and a .224/.322/.490 slash line.

Chapman went 2-for-4 with a solo home run in Monday's 5-3 win over the White Sox.

Chapman went 7-for-35 (.200) during his 10-game homer drought, which came after a span that saw him hit four long balls over five games in early August. The third baseman's blast was the Giants' lone run of Monday's game. He's up to 20 homers, 62 RBI, 84 runs scored, 12 stolen bases, 31 doubles and a .247/.336/.446 slash line through 124 contests.

Muncy (oblique) has been activated from the 60-day injured list ahead of Monday's game against the Mariners, David Vassegh of AM 570 LA Sports reports.

It was rumored over the weekend that Muncy might be available to return in time for Monday's series opener, and he's since been given the green light to take the field. The 33-year-old landed on the 60-day IL on May 17 due to a right oblique strain but should resume an everyday role in the infield going forward.

The Pirates placed Hayes on the 10-day injured list Monday with low-back inflammation, Noah Hiles of the Pittsburgh Post-Gazette reports.

It was reported earlier Monday that Hayes has been playing with a herniated disc in his back for much of the season, and this is the second time a back problem has landed him on the IL. It's not clear how much time he might miss. Jared Triolo figures to handle third base for now, although Isiah Kiner-Falefa could move there when Nick Gonzales (groin) returns.

Marte is out of the lineup for Monday's game against the Blue Jays.

After starting in 13 of the Reds' previous 14 games, Marte is absent from the lineup for a second straight game. Santiago Espinal will bat ninth and play the hot corner Monday. Marte has two hits and eight strikeouts in his last 20 at-bats.

Atlanta announced Monday that Riley was diagnosed with a fractured right hand following an MRI and is expected to miss 6-to-8 weeks.

Initial testing on Riley's hand after he was hit by a pitch Sunday was inconclusive, but Monday's MRI revealed the third baseman is dealing with a fracture. The 6-to-8-week timeline all but guarantees Riley won't return before October, with Atlanta's final regular-season contest being exactly six weeks away from this past Sunday. Atlanta currently holds the NL's third and final wild-card spot, so there's a chance Riley could be back for postseason play. In the meantime, Luke Williams will likely step in as Atlanta's primary option at the hot corner.

The Marlins designated Rivera for assignment Monday.

Rivera had seen his playing time drying up lately and with the arrival of Connor Norby, he's now off the roster altogether. The 28-year-old slashed just .214/.294/.269 with one home run in 96 games with Miami and would seem to stand a good chance of passing through waivers.

Hayes has played with a herniated disc in his back for much of the season, Jason Mackey of the Pittsburgh Post-Gazette reports.

Hayes missed most of May with the issue, and while he's stayed off the injured list since then, it sounds like the discomfort hasn't really gone away. It could at least partly explain the 27-year-old's dreadful .233/.283/.290 batting line this season. There doesn't seem to be any talk at this point of surgery and/or shutting Hayes down, but perhaps that changes when/if the Pirates decide they don't have a realistic chance of making the postseason. Hayes has five more years left on the eight-year, $70 million contract extension he signed in April of 2022.

Machado went 1-for-4 with a solo home run in Sunday's 3-2 loss to the Rockies.

Machado went 5-for-13 with two extra-base hits during the three-game series at Colorado. The third baseman has 19 homers on the year, including six over his last 18 contests as he's found more consistent power in the second half. He's added a .271/.322/.449 slash line, 71 RBI, 60 runs scored, 23 doubles and six stolen bases over 116 games.

Riley (hand) is set to undergo further evaluation after initial X-rays and testing were inconclusive Sunday, Justin Toscano of The Atlanta Journal-Constitution reports.

Riley was forced to exit Sunday's game against the Angels after being hit by a pitch in his right hand. There should be a clearer timeline for his potential return to the lineup Tuesday, as Atlanta is off Monday.