In the second quarter against the Ravens, Raiders tight end (and honorary offensive lineman) Lee Smith broke his right ankle.
Smith was unable to get off the field on his own power, and was helped off by Latavius Murray and Derek Carr.
As soon as the replay was shown, it was a near certainty that Smith broke his ankle. I’m no doctor, but David Chao is. He said it was a fractured ankle, and that said it would require surgery, which would unfortunately lead to the injured reserve.