UPDATE: Ryback took to Twitter to comment on his injury, revealing that he has a staph infection:

After Raw Monday I woke up Tuesday morning before some media appearances with a severe staff infection in my right knee. I was brought to a — The Big Guy (@Ryback22) July 16, 2015

Hospital and put on strong antibiotics and had 90 cc of fluid drained out of knee in a 24 hour period. We caught it in time thanks to the — The Big Guy (@Ryback22) July 16, 2015

Great WWE medical team and I will make a full recovery. Will be kept in the hospital for several days and I will not be able to defend my — The Big Guy (@Ryback22) July 16, 2015

Intercontinental Championship this Sunday. I am sorry to all my fans and the WWE. I will be back shortly, but I have to get this corrected. — The Big Guy (@Ryback22) July 16, 2015

Correction for the spelling bee champs out there staph infection #meathead — The Big Guy (@Ryback22) July 16, 2015

ORIGINAL: WWE.com has announced that Ryback sustained an injury on Raw, which will prevent him from competing against Big Show and Miz at Battleground this weekend.

The announcement does not list the nature of the injury and, at this time at least, it is unknown whether the match will continue at all. As of this writing the match has been completely removed from the Battleground page on the site.

More on this, obviously, as it develops.