On Monday, we received word about reports stemming from Saturday night.
Chiefs wide receiver Marcus Kemp suffered an ACL (anterior cruciate ligament) injury, which will require surgery to fix, and he will therefore be done for the 2019 season. We also learned that he suffered a torn MCL (medial collateral ligament) at the same time. We have not yet been told whether or not there was any meniscal damage.
In a way, this is easier to quantify and explain, as there was trauma. The player suffered what appeared to be a blow above his knee.