Arenado went 3-for-3 with an RBI, two runs scored and a stolen base in Thursday's loss to the Rays. He also drew a walk.

Arenado got the Cardinals on the board with an RBI single in the opening frame before coming around to score on a Paul Goldschmidt groundout. The third baseman would go on to reach base four times in the contest while also swiping his second bag of the season. The performance was Arenado's seventh game this season with three or more hits, and he's posted multiple knocks in five of his last nine contests. Over that stretch he's batting .411 (14-for-34) with three doubles, six RBI and five runs scored.

Rivera is absent from the lineup for Thursday's game versus the Reds.

Rivera has been the Marlins' primary third baseman of late while Jake Burger mostly occupies first base or the designated hitter slot. However, it will be Burger handling the hot corner in this one.

McMahon is out of the lineup for Thursday's game against the Mets.

The Rockies are wrapping up their series with a day game after a night game and are facing off against a lefty (David Peterson), so manager Bud Black likely viewed Thursday's contest as a good opportunity to give the lefty-hitting McMahon some off time. Aaron Schunk will step in at third base in place of McMahon, who had gone hitless in each of his last six starts, bringing his batting average down to .252 for the season.

Lipscomb is out of the lineup for Thursday's game against the Giants.

The righty-hitting Lipscomb had already been excluded from the starting nine in four of the Nationals' last six matchups with right-handed pitchers, but he'll now find himself on the bench Thursday against a lefty (Kyle Harrison). Lipscomb already seems to have lost hold of a regular role at third base to Ildemaro Vargas, and a demotion to the minors could be imminent for the 24-year-old Lipscomb, who is slashing just .152/.211/.182 since he was recalled from Triple-A Rochester on July 6.

Chapman went 3-for-4 with a double, a home run and two RBI in Wednesday's 7-4 win over the Nationals.

The veteran third baseman connected on his 19th homer of the year when he launched a solo shot off Jake Irvin in the fifth inning. Chapman has found a groove since the All-Star break, and over his last 14 games he's slashing .377/.459/.811 with five doubles, six long balls, 13 runs and 13 RBI.

Burger went 2-for-4 with two solo home runs in Wednesday's 6-4 win over the Reds.

Both blasts came off Andrew Abbott, as Burger took the southpaw deep in the first and fifth innings. The 28-year-old has found his power stroke since the All-Star break, slashing .296/.362/.718 over the last 19 games with nine of his 17 homers on the season, but the patchwork lineup around him hasn't given him many opportunities to drive in runs with them -- Burger has only 14 RBI to show for those nine long balls.

Riley went 2-for-4 with a two-run home run, an RBI double, a walk and two total runs scored in Wednesday's 8-5 loss to Milwaukee.

Riley has gone 15-for-40 (.375) with three homers and 10 RBI over his last 10 games. He twice gave Atlanta the lead Wednesday, but Milwaukee was able to offer a response each time. For the season, Riley is up to a .264/.331/.467 slash line with 16 homers, 50 RBI, 56 runs scored, 25 doubles and no stolen bases over 99 games.

Ortiz went 3-for-4 with two doubles, one walk, two RBI and one run scored in Wednesday's 8-5 win over Atlanta.

This was Ortiz's second multi-hit effort in a row after he went a mere 7-for-50 (.140) over his first 14 games of the second half. The infielder also logged multiple RBI in a game for the first time since June 15. Despite his struggles at the plate, Ortiz has maintained steady playing time at third base. He's now at a .253/.353/.404 slash line with seven home runs, six stolen bases, 35 RBI, 39 runs scored, 16 doubles and three triples over 93 contests this year.

Muncy (oblique) will begin a rehab assignment at Triple-A Oklahoma City over the weekend, Bill Plunkett of The Orange County Register reports.

Muncy will spend at least a week in Triple-A before returning to the Dodgers, putting his earliest possible return date sometime in mid-August. The slugging third baseman has been on the injured list since May 17 with a right oblique strain and only recently began making strides in his recovery after a chiropractor visit last week.

Vientos isn't in the Mets' lineup Wednesday against the Rockies.

Vientos will get a chance to regroup Wednesday after going 0-for-8 with two strikeouts over his last two games. In his place, Jose Iglesias will start at third base and bat sixth.