Sheamus hasn't been seen in the WWE since the Raw and SmackDown after WrestleMania 35, and there's a growing concern that we may never see him compete for the company again.

The Celtic Warrior has a well-known injury history. He suffers from stenosis in his spine, which has ended the careers of wrestlers in the past.

While it has been noted that this most recent injury is a concussion, so he won't be able to return until he clears concussion protocol, there may be more to the story.

Sean Ross Sapp of Fightful , via Ringside News, has reported that there was hope Sheamus would be able to compete at WrestleMania this year, which he did.

He also added that there's no update yet regarding the status of The Celtic Warrior's injury, but he experienced his share of issues before being sidelined.

He said: “I had heard last year that there were a lot of people that were surprised that Sheamus could still wrestle as effectively as he could considering some of the injury issues and the pain that he had been in.

“Honestly the thing I was told by one wrestler was that if he got through WrestleMania that would be really awesome.

"Not as if they were hoping that or the company was hoping that, but that wrestler personally was hoping that Sheamus could get through this WrestleMania and he did and that was about it.

"No update yet, but man, with a bad neck and then you get a concussion on top of that, that’s not hot.”

The Celtic Warrior's last match to date for WWE was on the SmackDown after WrestleMania when The Bar teamed up with Drew McIntyre in a losing effort vs The New Day.

The Bar has effectively been split up now as well with Cesaro moving over to Raw in the Superstar Shake-up. Sheamus is still assigned to SmackDown on WWE's website.

There's now a growing concern that we may never see Sheamus compete for WWE again. Fingers crossed that isn't the case and he returns to the ring for another match soon.