3:03 PM ET

Los Angeles Angels star Mike Trout is dealing with a rare condition in his back that he likely will have to manage through the rest of his career.

The Angels were expecting Mike Trout to return quickly after he was placed on the injured list with rib cage inflammation.

The Angels are worried about Trout because he has a costovertebral problem at his T5 spine.

He has a rare condition in his back. One of the most well-known spine surgeons in the country, Robert Watkins III, doesn't see many of these.

"For it to happen in a baseball player, we just have to take into account what he puts himself through with hitting, swinging on a daily basis just to get prepared, and then also playing in the outfielder, diving for balls, jumping into the wall." Many things can make it worse. The doctor has not seen much of it.

According to Frostad, the 10-time All-Star is "upbeat" but acknowledged the possibility of a long-term condition after he had a back injection last week.

He's starting to feel like he's getting the benefits. He has to manage it, not just through the rest of this season, but the rest of his career as well.

The Angels have not yet made a decision about shutting down Trout for the rest of the season, as he is scheduled for a follow-up appointment next week.

The second highest-paid player in the game, Mike Trout, has not spoken to reporters since the All-Star Game. He had been enjoying a nice bounce-back season after a calf injury limited him to just 36 games last season, and he provided a rare bright spot in what has been a dismal season for the Angels.

The interim manager of the Angels said that he has been a great teammate. He's a good sounding board for a lot of young players. It's huge for them to have him here and know that he supports them.

The AP contributed.