The Pirates selected Flores' contract from Triple-A Indianapolis on Tuesday, Noah Hiles of the Pittsburgh Post-Gazette reports.

Acquired from the Yankees on July 31, Flores has slashed .280/.354/.470 with 22 home runs and six stolen bases over 133 games between the Double- and Triple-A levels this season. The 24-year-old has primarily been used at catcher but also has plenty of experience playing first base. With Henry Davis and Joey Bart both having disappointed this season, the Pirates could give Flores a look behind the plate down the stretch.

Amaya (ankle) is set to begin a rehab assignment at Triple-A Iowa on Tuesday, MLB.com reports.

Amaya isn't considered fully recovered from the left ankle sprain he suffered Aug. 13, which he sustained in his first game back from the injured list after he had been shelved since late May due to a left oblique strain. However, Amaya has made enough progress in his recovery from the ankle injury to run the bases, so he'll serve as a designated hitter for Iowa on Tuesday. Manager Craig Counsell is hopeful that Amaya will resume catching for Iowa later in the week, and if all goes well, the 26-year-old could rejoin the Cubs for the final week of the regular season.

Adams is absent from the lineup for the first game of Tuesday's doubleheader versus Atlanta.

It will be Jorge Alfaro doing the catching for the Nationals in the first game. Adams should be back behind the dish in the nightcap.

Atlanta transferred Murphy (hip) from the 10-day injured list to the 60-day IL on Tuesday.

The transaction frees up a 40-man roster spot for left-hander Jose Suarez, who was called up from Triple-A Gwinnett to start the first game of Tuesday's doubleheader with the Nationals. Murphy is done for the season following surgery last week to repair a right hip labral tear.

McCann went 1-for-4 with a two-run home run in Monday's 8-1 win over the Giants.

This was McCann's second straight game with a homer, and he's gone 6-for-15 over four contests in September. While his playing time has remained limited as backup to Gabriel Moreno, McCann continues to be productive in his rare chances to enter the lineup. McCann is at a .257/.327/.446 slash line with five homers, 15 RBI, 16 runs scored and four doubles across 36 games this season.

Stephenson went 2-for-4 with a three-RBI double and a run scored in Monday's 11-6 victory over the Cardinals.

Stephenson broke the game open Monday with a bases-clearing double in the ninth inning. That pushed his season total to 17 doubles as he works toward reaching 20 or more for the fourth time in his big-league career.

Baldwin went 3-for-5 with a home run and four RBI in Monday's 11-3 victory over the Nationals.

The rookie backstop notched his third career performance with four or more RBI, upping his season total to 68. Baldwin topped Atlanta's scoring with a 378-foot, two-run shot off reliever Orlando Ribalta in the ninth. The 24-year-old is now slashing .268/.337/.439 with 16 homers across 395 total plate appearances.

Davis is absent from the lineup for Monday's contest against the Cubs.

Davis will yield to Joey Bart at catcher for the second day in a row. The two have split playing time behind the dish the month, with Davis receiving seven starts to Bart's six.

The Nationals announced Monday that Ruiz (concussion) will continue to participate in baseball activities this week, though it's unclear if he'll return from the 7-day injured list before the end of the season, Spencer Nusbaum of The Washington Post reports.

The organization will likely wait and see how Ruiz fares in his workouts over the next few days before deciding on his next steps. Ruiz is the midst of his second stint on the injured list due to concussions and was pulled off a rehab assignment earlier this month after experiencing renewed symptoms.

Pages is out of the lineup for Monday's game against the Reds, John Denton of MLB.com reports.

Pages had made starts behind the plate in four of the Cardinals' previous five games, but he'll take a seat as St. Louis opens a three-game set with one of its divisional rivals. Jimmy Crooks will handle catching duties Monday.