The Angels have announced a significant roster shuffle occasioned by a few injuries. Starters Garrett Richards and Nick Tropeano are each hitting the DL, as are infielder Zack Cozart and reliever Jim Johnson.

It’s not fully clear how severe these injuries are, but it’s still an ugly casualty list for a team that has already had some worrying health issues arise recently. Richards has a left hamstring strain, while Tropeano is dealing with right shoulder inflammation.

With Shohei Ohtani already on the shelf, likely joining JC Ramirez and Matt Shoemaker there for a lengthy stretch, the team’s rotation depth has already been tapped into. It seems the team is likely to call upon John Lamb in the near-term, as Jeff Fletcher of the Orange County Register tweets that he’s with the team (though not yet active). That’ll require a 40-man move. Otherwise, the best 40-man possibilities are Parker Bridwell, Felix Pena, and Miguel Almonte.

Pena is among the four players coming up to take the open roster spots for the time being. He could presumably become a rotation option, but there’s a pressing enough need that it’s fair to wonder if outside possibilities will be pursued.

Along with Pena, the team has called up three additional right-handed hurlers to help absorb innings. Eduardo Paredes, Akeel Morris, and Jake Jewell will all come off of the Triple-A Salt Lake roster to join the club in Oakland. That’ll at least help the team deal with the absence of Johnson, who has a lumbar strain.

In some regards — without knowing details yet from the team — Cozart’s injury may be the most worrisome. It’s particularly poor timing given that Andrelton Simmons is also sidelined, though the real concern here is the question of severity.

Cozart has been diagnosed with a left shoulder subluxation, a potentially worrying injury. That injury has in recent years sent at least two players — righty Carson Smith and infielder Marco Hernandez — to the operating room for season-ending procedures. Hopefully, that won’t be needed in Cozart’s case, but the fates of those players serve to illustrate the seriousness of injuries of this general variety.