Gallo went 1-for-4 with a three-run homer in Tuesday's 6-2 victory over the Marlins.

Gallo widened Washington's lead to 4-0 in the fourth inning, smacking a first-pitch fastball from Max Meyer over the center field wall for a three-run homer. It's Gallo's sixth homer of the year and his first since June 3 -- he'd gone just 8-for-41 (.195) in his prior 16 contests. Overall, Gallo's slashing .172/.291/.331 with 17 RBI, 20 runs scored and a pair of stolen bases across 199 plate appearances in a part-time role this season.

Bell served as the designated hitter and went 0-for-4 with an RBI in Tuesday's 8-7 win over San Francisco.

Bell, who had been the primary first baseman for the last month, moved to DH as Christian Walker returned to first base after being activated off the 10-day injured list. Bell acquitted himself well as a replacement, batting .283 with an .809 OPS over 28 games, and should see work as the DH against left-handers going forward.

Walker went 1-for-5 with an RBI in Tuesday's 8-7 win over the Giants.

Walker was in the starting lineup on the day he was activated from the 10-day injured list. He missed the entire month of August because of an oblique injury. Walker is set to resume his role as the everyday first baseman.

Brown went 3-for-4 with a solo home run in Tuesday's 3-2 win over the Mariners.

Brown got the A's back level with a solo home run in the fourth and then supplied a walk-off single in the ninth off Trent Thornton. Over his last six starts, Brown has turned in five multi-hit games while racking up 10 RBI over that span. Since being brought back up to the majors July 11, he's slashing .320/.381/.557 with eight homers, 25 RBI, 15 runs and a 10:27 BB:K in 136 plate appearances.

Naylor left Tuesday's game versus the Royals with an acute back spasm, Joe Noga of The Cleveland Plain Dealer reports.

Naylor went 1-for-4 but exited in the eighth inning, with Jhonkensy Noel replacing him as a pinch runner and staying in the game at first base. Noel could see time at first base if Naylor is unable to play in Wednesday's series finale. Naylor has mostly avoided injuries this year, missing time with general soreness in late July.

Goldschmidt went 3-for-5 with a home run, a double, and three RBI in Tuesday's 7-4 victory at Milwaukee.

The former MVP stretched the St. Louis lead to 2-0 in the second with an RBI double, his 27th two-bagger of the season. Goldschmidt returned in the fourth inning to launch a 430-foot solo shot off Aaron Civale. The free-agent-to-be has caught fire lately, hitting .342 (26-for-76) with four homers, nine doubles, 13 RBI and five runs scored over his last 20 games. Overall, he is now slashing .247/.305/.420 with 21 homers, 58 RBI, 61 runs scored and nine stolen bases across 568 plate appearances.

Yepez is not in the lineup for Tuesday's game against the Marlins, Bobby Blanco of MASNSports.com reports.

It's the second time on the bench in Washington's past three games for Yepez, who has gone 7-for-23 with two homers over his past seven contests. Andres Chaparro will shift to designated hitter while Joey Gallo starts at first base against Miami righty Max Meyer.

Diaz is out of the lineup for Tuesday's game against the Twins.

The 33-year-old served as Tampa Bay's designated hitter the past two games after sitting out Saturday due to a knee issue. It hasn't been reported that Diaz has suffered a setback, but it's possible his knee still isn't 100 percent. Jonathan Aranda is receiving a start at first base Tuesday for the Rays.

The Diamondbacks reinstated Walker (oblique) from the 10-day injured list Tuesday, Jesse Friedman of GoPHNX.com reports.

A left oblique strain sent Walker to the injured list at the end of July, and he's now set to reclaim his role as Arizona's everyday first baseman. The 33-year-old slashed .152/.293/.273 with a homer and five RBI across his last 10 games prior to getting hurt, and he may need some time to kick the rust off after not playing in any rehab games. Lourdes Gurriel (calf) was placed on the IL in a corresponding move.

Rizzo is absent from the lineup for Tuesday's game versus the Rangers.

Rizzo started each of the first two games off the injured list against right-handers but will begin Tuesday's game on the bench as the Rangers send lefty Andrew Heaney to the hill. DJ LeMahieu will draw the start at first base Tuesday.