Quero (hamstring), per Adam McCalvy of MLB.com, "played his first minor-league game of the season Monday... for Milwaukee's Arizona Complex League club."

A hamstring injury delayed Quero's start to the season, but he seems to be nearing a full recovery. The 22-year-old missed nearly all of last season with a shoulder injury, but he remains both one of Milwaukee's top prospects and one of the better catching prospects league-wide.

Diaz isn't in the lineup for Tuesday's game against the Angels.

Diaz will give way to Martin Maldonado behind the dish after the former went 0-for-4 with a strikeout in the series opener Monday.

The Cubs selected Ballesteros' contract from Triple-A Iowa on Tuesday, Sahadev Sharma of The Athletic reports.

Ballesteros earned the promotion after batting .368 with four home runs, 18 RBI and three stolen bases over 34 games at Iowa. The 21-year-old will be making his major-league debut when he gets into a game and could serve as the Cubs' primary designated hitter while Ian Happ (oblique) is out, with Seiya Suzuki covering left field.

Murphy is not in the lineup for Tuesday's game against the Nationals.

Murphy started at catcher in the series opener Monday but will get a breather in this one. Drake Baldwin is behind the plate and batting fifth for Atlanta.

Padres general manager A.J. Preller said Monday that Salas has been diagnosed with a stress reaction in his lower back and is expected to remain out until July, AJ Cassavell of MLB.com reports.

Salas was placed on Double-A San Antonio's 7-day injured list at the beginning of May due to back spasms, but after further evaluation, the young catcher has been revealed to be dealing with a more significant injury. Cassavell notes that the team is hopeful Salas will be ready to resume playing in about two months after treating the back injury with rest and rehab.

Ballesteros is expected to be called up from Triple-A Iowa ahead of Tuesday's game against the Marlins, Bruce Levine of 670TheScore.com reports.

A 21-year-old catching prospect, Ballesteros will likely enter the lineup Tuesday against the Marlins and could see regular starts at designated hitter with Ian Happ (oblique) set to be placed on the injured list in a corresponding move. Ballesteros has been mashing at Triple-A so far this season, batting .368 with four home runs, 18 RBI and three stolen bases over 34 games.

Murphy (back) will be re-evaluated in six weeks, Alex Pavlovic of NBC Sports Bay Area reports.

Murphy started the season on the 60-day injured list due to disc herniation in his back that he suffered during spring training in February. He'll have his injury re-evaluated near the end of June, so the 34-year-old catcher may not be back on the major-league roster until after the All-Star break.

Amaya is starting at catcher and batting eighth in Monday's game against the Marlins.

The Cubs are mixing things up a bit with Ian Happ (oblique) out for the third straight day, as regular DH Seiya Suzuki is covering Happ's spot in the outfield. Carson Kelly is sliding in as the DH on Monday, which opens up a start behind the plate for Amaya. While he hasn't been able to match Kelly's scintillating 1.151 OPS, Amaya has been a reliable offensive performer with a .741 OPS, three home runs and 18 RBI across 21 games.

Kelly is serving as the designated hitter and batting fifth in Monday's game against the Marlins.

With Ian Happ (oblique) out for the third straight game, the Cubs have shifted Seiya Suzuki into the outfield, which has opened up the DH role. Justin Turner filled in the last two days, but it will be Kelly on Monday, with Miguel Amaya getting the nod behind the plate. Kelly has been scorching hot to begin the year with a 1.151 OPS across 24 games.

Bart is serving as the designated hitter and batting in the cleanup spot against the Mets on Monday.

With Oneil Cruz (back) sidelined for a second straight game, Andrew McCutchen will move to the outfield, which opens the DH spot for Bart while Henry Davis starts behind home plate. Bart went 6-for-12 with three RBI during the Pirates' three-game weekend series against Atlanta.