They’ll play in front of an empty house at Camden Yards on Wednesday afternoon, an arrangement that is not only unusual but, in Major League Baseball terms, unprecedented. And afterward, the Orioles will pack up and hit the road for three “home” games at Tropicana Field, an arrangement that is not unprecedented but, yes, is still pretty unusual.

As violent protests for Freddie Gray moved through Baltimore, and closer to Camden Yards, the Orioles postponed Monday night’s game against the White Sox.

Right-handed starter Brandon McCarthy (3-0, 5.87 ERA) is out for the season because of a torn ulnar collateral ligament, and he’s likely headed for Tommy John surgery.

Andrew McCutchen has carried the Pirates during recent years, but the tables have turned early this season with the center fielder struggling at the plate.

Many fans have watched David Ortiz in action at Fenway Park. Far fewer have eaten dinner with the Red Sox slugger, but those who are able to support a charitable cause this summer have the opportunity to do just that.

Rays manager Kevin Cash said the club intends to be careful with Desmond Jennings and his left knee. “I think he’s feeling better,” Cash said. “He’s a big part of what we’re doing, and we need to get him healthy and back in the lineup. We don’t want to rush anything right now.”

Former All-Star closer Chris Perez opted out of his Minor League contract with Milwaukee on Monday and became a free agent.

Most nights in Port St. Lucie, Fla., once he is finished with his daily rehab, Bobby Parnell fires up the Mets broadcast on his phone. In that manner, he has taken notice of a bullpen that entered Monday’s play second in the National League in ERA, despite the absences of Parnell, Vic Black, Josh Edgin and Jenrry Mejia. Jeurys Familia in particular has thrived in the closer’s role that used to belong to Parnell.

Having just faced the Cubs and their corps of young sluggers, the Pirates enter this week’s three-game series at Wrigley Field able to rely on their own experiences instead of scouting reports.

The Cardinals will be without their ace for the rest of the season.
General manager John Mozeliak confirmed on Monday that Adam Wainwright has a torn left Achilles and will likely miss 9-12 months.

The Pirates scratched Gregory Polanco from their starting lineup about an hour before Monday’s series opener against the Cubs at Wrigley Field because of tightness in his left groin.

Reds starting pitcher Homer Bailey’s recovery and rehabilitation from September surgery that repaired a torn flexor mass tendon near his right elbow had been a smooth process. That was until news broke Monday that Bailey was placed on the 15-day disabled list, retroactive to Friday, with a right elbow ligament sprain.

Nationals infielder Anthony Rendon was scratched from his rehab start Monday in Double-A because of fatigue, as he recovers from a sprained left knee.

Nick Swisher is almost ready to rejoin the Indians. On Monday, Swisher was on hand at Progressive Field to go through a workout and meet with manager Terry Francona, general manager Chris Antonetti and the team’s training staff to formulate a plan for the coming week.

Cardinals rotation ace Adam Wainwright has often been a thorn in the Reds’ side, including as recently as April 19 when he outdueled Mike Leake’s 86-pitch complete-game performance for a 2-1 victory. However, Reds manager Bryan Price took no joy from the past weekend’s developments.

The Rangers completed the acquisition of outfielder Josh Hamilton from the Angels on Monday. Los Angeles will receive either cash considerations or a player to be named later.

Alex Colome is with the team on the road trip, and the right-hander is expected to make his first start of the season against the Orioles this weekend. “The only thing I know is I’m pitching in the Baltimore series, but I don’t know what day exactly,” Colome said.