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.

Riley was removed from Sunday's game against the Angels after being hit by a pitch on his right hand, Justin Toscano of The Atlanta Journal-Constitution reports.

The third baseman initially stayed in to run the bases after being struck on the hand by a 97-mph sinker in the top of the first inning, but he was replaced in the field by Luke Williams for the bottom of the frame. Riley is likely headed for X-rays, leaving his availability up in the air heading into Tuesday's series opener versus the Phillies.

Muncy (oblique) is traveling to Los Angeles and could be activated for Monday's series opener versus the Mariners, Fabian Ardaya of The Athletic reports.

The Dodgers were planning to reinstate the 33-year-old for Tuesday's contest, but Freddie Freeman's finger injury could necessitate a trip to the injured list and move that timeline up a day. Muncy has gone 6-for-21 with a double and a homer during his six-game rehab assignment with Triple-A Oklahoma City, and he's ready to rejoin the active roster after spending three months on the injured list due to a strained oblique.

Paredes was scratched from Sunday's lineup against the Blue Jays due to right shoulder discomfort, Andy Martinez of Marquee Sports Network reports.

It's unclear when Paredes suffered the injury, but he struggled over the past few games and went 0-for-11 with two strikeouts. The 25-year-old will have Monday's team off day to aid in his recovery ahead of Tuesday's series opener versus Detroit. Patrick Wisdom has replaced Paredes at third base for Sunday's contest.

Arenado went 1-for-4 with a solo home run in Saturday's 5-2 win over the Dodgers.

Arenado's homer was his second over the last four games. The third baseman has been steady at the plate in August, going 17-for-56 (.304) with 10 RBI over 15 games this month. He's up to a .268/.323/.395 slash line, 13 homers, 55 RBI, 51 runs scored, 17 doubles and two stolen bases over 116 contests for the season.

Hayes is not in the starting lineup for Sunday's series finale against Seattle.

Hayes has gone 0-for-12 with five strikeouts over his last three games. He'll begin Sunday's contest in the dugout while Jared Triolo starts at third base and bats ninth.