Shoulder issues will likely keep pitchers Jack Flaherty and Alex Reyes from being available for the St. Louis Cardinals’ opener against Pittsburgh on April 7.

Flaherty underwent imaging tests on his right shoulder Tuesday.

Reyes, a 27-year-old right-hander, was scheduled to receive what manager Oliver Marmol termed a therapeutic injection on Wednesday at the Andrews Institute in Gulf Breeze, Florida.

The Cardinals were barred by Major League Baseball from contacting their players during the lockout and learned of the injuries when the players reported.

Flaherty, 26, was 11-8 with a 2.75 ERA in 2019, went 4-3 with a 4.91 during the pandemic-shortened 2020 season and 9-2 with a 3.22 in 17 starts last year, when he was slowed by an oblique injury,

The oft-injured Reyes had 29 saves last season. He is expected back at camp on Friday.

All-star catcher Yadier Molina is absent because of what the Cardinals say are personal reasons. Marmol doesn’t know when the 39-year-old will arrive.

Reliever Giovanny Gallegos, who replaced Reyes as the Cardinals’ primary closer late last season, was expected to arrive at camp on Thursday. He, too, was delayed because of personal reasons.

Reliever Genesis Cabrera arrived after flight delays.

Adam Wainwright will start Friday’s exhibition opener against Houston. Miles Mikolas and Steven Matz will get the next two starts.