Baldwin is out of the lineup for Wednesday's game against the Diamondbacks.

The Diamondbacks are sending Merrill Kelly to the bump Wednesday, but the left-handed-hitting Baldwin will take a seat for the second time in Atlanta's last four matchups with a righty. After he previously appeared content to deploy Baldwin and Sean Murphy in a platoon behind the plate, Atlanta manager Brian Snitker may be favoring more of a timeshare arrangement between the two backstops to keep both fresh. Baldwin and Murphy have now alternated starts over the last six games.

Davis is out of the lineup for Wednesday's game against the Astros.

With Joey Bart (concussion) going on the injured list last week, Davis started behind the plate in four of the past five games, but the former might move into more of a timeshare at catcher as Endy Rodriguez becomes further removed from the index finger laceration that recently kept him on the shelf. Davis has supplied a middling .255/.326/.325 slash line since the beginning of May and could need to improve his production in order to gain more separation from Rodriguez in the battle for playing time between the two.

Adams will start at catcher and bat seventh in Wednesday's game against the Cubs, Mark Zuckerman of MASNSports.com reports.

Adams will be making just his 10th start of the season while top backstop Keibert Ruiz receives a rare day off. The lack of consistent playing time could be a factor in Adams' lackluster production at the dish; he heads into Wednesday's game with a .135/.135/.324 slash line and a 45.9 percent strikeout rate over 37 plate appearances.

Ruiz is out of the lineup for Wednesday's game against the Cubs, Mark Zuckerman of MASNSports.com reports.

The Nationals will give Ruiz a breather after he had started behind the plate in each of the last three games. Riley Adams will handle the catching duties Wednesday.

Bailey went 1-for-3 with a double, a walk and a run scored in Tuesday's 3-2 extra-inning loss to the Padres.

The 26-year-old doubled in the third inning before coming around to score on a two-run homer by Heliot Ramos. Bailey has recorded at least one hit in four straight games, slashing .357/.438/.500 with two doubles, two runs scored and a 2:4 BB:K across 16 plate appearances in that span. Overall, he's slashing .191/.254/.276 with 17 runs scored, 15 RBI, 10 extra-base hits -- including one home run -- and a 14:54 BB:K over 170 plate appearances.

The Giants selected Knizner's contract from Triple-A Sacramento on Wednesday, Shayna Rubin of the San Francisco Chronicle reports.

Knizner inked a minor-league deal a couple weeks ago and has been added to the big-league roster after going 11-for-30 in eight games with Sacramento. He'll take over backup catcher duties behind Patrick Bailey.

The Giants designated Huff for assignment Wednesday, Shayna Rubin of the San Francisco Chronicle reports.

Huff has slashed only .208/.259/.340 as the Giants' backup catcher, which wasn't good enough for him to stick around with the big club, especially since he's known more for his bat than his defense. Andrew Knizner was called up from Triple-A Sacramento and will take over as the team's new No. 2 catcher.

Baldwin went 1-for-4 with a solo home run in Tuesday's loss to the Diamondbacks.

Fresh off being named the NL Rookie of the Month for May, Baldwin got hold of a Zac Gallen cutter in the fourth inning and ripped it down the right-field line for his sixth homer of the season. The rookie has been splitting starts behind the plate with Sean Murphy of late, but Baldwin's been the more productive hitter with a .379/.400/.621 slash line, four homers and 10 RBI over his last 20 games.

Contreras is not in the lineup for Wednesday's game in Cincinnati.

Contreras will get a rare day off after going hitless in the first two games of the series. Eric Haase will start at catcher and bat eighth for the Brewers.

Stallings will start at catcher and bat eighth in Wednesday's game against the Marlins.

Stallings will crack the lineup for just the second time in eight games, with both starts coming in day games after night games. The veteran backstop will likely continue to see infrequent playing time while Hunter Goodman is entrenched as the Rockies' No. 1 catcher.