Massey isn't in the Royals' lineup Tuesday against Detroit.

With southpaw Tarik Skubal set to take the mound for the Tigers on Tuesday, Massey will stay put in Kansas City's dugout to begin the game. Matt Duffy will take over at second base and bat seventh.

Diaz (illness) is starting at designated hitter and batting third Tuesday versus the Red Sox.

Diaz will return to the lineup after exiting Monday's loss early with an illness. The 22-year-old has seen some extended run in July, batting .300 with two homers, four RBI and four runs scored over 30 at-bats in 10 contests.

Valdez has been placed on the 7-day injured list at Triple-A Worcester with a strained left hamstring, Chris Cotillo of The Springfield Republican reports.

Valdez just returned from a thumb injury two weeks ago and now he's back on the IL. It's not clear how long this injury might keep him sidelined, but clearly he's not going to be an option for the Red Sox for a bit.

Vivas is slashing .300/.404/.474 with 10 home runs, 13 steals and a 38:36 K:BB in 79 games for Double-A Tulsa.

The 22-year-old second baseman has been steady all season for the Drillers, and he could soon get a promotion to Triple-A. Vivas, who hits left-handed, has a 21.7 percent hard-hit rate and a 22.5 percent soft-hit rate, and he projects for below-average game power in the big leagues despite this strong showing in the Texas League.

Atlanta selected Wall's contract from Triple-A Gwinnett on Tuesday.

A supplemental first-round pick (35th overall) by the Rockies in the 2014 MLB Draft, Wall has finally reached the majors at age 27. He joined Atlanta on a minor-league contract over the winter and had slashed .258/.360/.399 with six homers and 45 stolen bases through 78 games this season at the Triple-A level. Wall figures to primary serve as a pinch-runner and late-game defensive replacement for the NL East leaders. He can cover all three outfield spots.

Gimenez went 1-for-4 with a two-run home run and a walk in Monday's 11-0 win over the Pirates.

Gimenez capped off the Guardians' four-run sixth inning with his homer. The second baseman has knocked three of his eight homers this season in July, batting .250 with eight RBI over 12 contests this month. He's at a .243/.316/.388 slash line with 36 RBI, 41 runs scored, 15 stolen bases, 14 doubles and four triples through 89 games overall.

Rosario went 2-for-4 with a two-run home run and an additional run scored in Monday's 11-0 win over the Pirates.

Rosario went 0-for-9 over his previous two games, slightly cooling off from what's been a hot July for the shortstop. He's batting .288 with two homers and 14 RBI over 13 games this month. For the season, Rosario is up to a .263/.305/.360 slash line with three long balls, 36 RBI, 46 runs scored and nine stolen bases through 87 contests.

Julien went 3-for-4 with a walk, a stolen base and a run scored in Monday's 7-6 loss to the Mariners.

Julien has hit safely in seven of his last eight games, going 12-for-21 (.571) with six extra-base hits in that span. His steal Monday was his second of the campaign. The second baseman is more than holding his own against major-league pitching with a .298/.373/.525 slash line, seven home runs, 14 RBI, 21 runs scored and 11 doubles through 162 plate appearances, though his 32.1 percent strikeout rate is a bit lofty.

Diaz was lifted from Monday's game against the Red Sox due to illness, Martin Gallegos of MLB.com reports.

The team didn't disclose many details surrounding Diaz's status moving forward, so he'll be considered day-to-day until more information comes to light. He went 0-for-2 with a pair of strikeouts prior to being removed.

Cardinals manager Oliver Marmol said Monday that Donovan (arm) is still about a week away from being cleared to play the field, Jeff Jones of the Belleville News-Democrat reports.

Donovan resumed some throwing drills over the weekend as he works his way back from a right arm issue, but he'll remain limited to designated hitter duty for a while longer. It hasn't affected him at the plate, as the 26-year-old is sporting a 1.047 OPS so far in July.