So this might be some serious news.
If people saw the ending of Bills-Jets yesterday, they probably noticed Josh Allen looked a bit uncomfortable and was sort of grabbing his elbow/arm. Well reports today seem to indicate he has some sort of UCL injury and it's also affecting "related nerves" to the area. That doesn't sound good, but they are still doing tests and it sounds like we'll hear the severity of the injury tomorrow.
FWIW, Allen did have a UCL injury in 2018 and missed 4 weeks, and typically a UCL injury has a 4-6 week timeline BUT there's also the possibility it'll require surgery or there's other issues too which might even mean Allen misses the rest of the year.
Basically, Josh Allen could be out for a while unless he gets better news tomorrow from the tests