Big Cass suffered a knee injury during tonight’s Brooklyn Street Fight with Enzo Amore on RAW, according to WWE.com. 
Cass was going for a running big boot when Enzo dumped him over the top rope and he landed bad on the leg. Cass worked for a few more minutes before his knee went out during an Empire Elbow attempt. A trainer came to check on Cass and Enzo ended up winning due to Cass not being able to compete.
“It’s hard to tell what the extent of the injury is, but we’re going to send him to get an MRI tomorrow and figure that out,” said WWE ringside physician Dr. Chris Robinson.

We will keep you updated on the extent of his injury as news breaks.