Espinal will start at second base and bat eighth in the second game of Wednesday's doubleheader versus Atlanta.

Espinal has now picked up just two starts in the Reds' six games since the All-Star break. He saw an uptick in playing time to close out the second half while Jonathan India managed a knee contusion, but Espinal has shifted back into a utility role now that India has seemingly moved past the injury.

McMahon (finger) will start at third base and bat fourth in Wednesday's game versus the Red Sox.

He jammed a finger in Monday's game and didn't play Tuesday, but he's feeling well enough to give it a go in Wednesday's series finale. McMahon has reached base 11 times over his last five contests but will bring a 23-game homerless streak into action Wednesday.

Arenado went 1-for-3 with a solo home run in Tuesday's 2-1 win over the Pirates.

Arenado showed some veteran savvy, opening the scoring with his fifth-inning solo shot off Pirates wunderkind Paul Skenes. While Arenado is just 3-for-18 over five games since the All-Star break, two of those hits have landed over the fence. The third baseman is up to 10 long balls, 42 RBI, 40 runs scored, 14 doubles and one stolen base while slashing .265/.319/.387 through 95 contests.

McMahon (finger) isn't in the Rockies' lineup Tuesday against the Red Sox.

A jammed finger prevented McMahon from starting Monday's game, and he'll need at least another day to recover before returning to Colorado's starting nine. Aaron Schunk will pick up another start at third base and bat ninth Tuesday.

Rios signed a minor-league deal with the Reds on Tuesday, Charlie Goldsmith of The Cincinnati Enquirer reports.

Rios was designated for assignment Friday and elected free agency. However, after spending the weekend testing the open market, he'll return to the Reds organization on a minor-league pact. The 30-year-old slashed .236/.333/.483 in 204 plate appearances with Triple-A Louisville.

Candelario is out of the lineup for Tuesday's game against Atlanta.

Candelario is absent from the starting lineup in what will be his first true day off since April. The 30-year-old is slashing .236/.292/.448 with 16 home runs across 370 plate appearances. Noelvi Marte will play third base and Santiago Espinal will DH.

Hayes is absent from the lineup for Tuesday's game versus the Cardinals.

Hayes went hitless in four plate appearances in the series opener Monday and will now begin Tuesday's festivities on the bench. The Pirates will go with Jared Triolo at third base.

Rivera isn't in the lineup for Tuesday's game against the Orioles.

Rivera will be on the bench for the third time in five games since the All-Star break, with Josh Bell starting at first base and Jake Burger handling the hot corner. Rivera is slashing .214/.303/.253 through 179 plate appearances this season.

Atlanta placed Riley on the paternity list Monday.

Riley was removed from Monday's 4-1 loss to the Reds in the ninth inning after his wife went into labor, and he's now officially on the paternity list as he welcomes a new arrival to the family. He is expected to be back with Atlanta for the start of its series Thursday against the Mets, per David O'Brien of The Athletic. Nacho Alvarez is handling third base Tuesday while Zack Short occupies second base.

McMahon is not in the starting lineup for Monday's series opener against the Red Sox due to a jammed finger, Patrick Lyons of JustBaseball.com reports.

McMahon was originally slated for a rest day Sunday, but he was inserted into the starting lineup after Ezequiel Tovar went home with flu-like symptoms and wound up jamming his finger. The issue doesn't appear to be serious though, and McMahon could be back Tuesday. Aaron Schunk will get the nod at the hot corner and bat ninth against Boston right-hander Tanner Houck.