John Cena suffered some sort of legitimate knee injury on RAW this week as he was attacked by The Wyatt Family. Rowan grabbed Cena's leg and held it in one position as the weight of his body went the other way as the others attacked him. Cena was able to gut the segment out and WWE's medical staff came down during the break.
There is talk that he may have dislocated or hyper-extended his knee. The knee swelled up backstage.
WWE is providing updates throughout RAW.
More as we get it.