re: Ok how serious is the Chuma injury???

Family medicine doctor here.. no sports med fellow ship but do a lot of MSK stuff by the nature of primary care.

Non contact valgus stress on a mildly flexed knee. If it was a test question I would go MCL as primary structure injured. But with how big these guys are the torque they apply can be like if a regular person had external forces too. You can have ACL and PCL involvment (and meniscus too) even without contact but less likely. Nothing is 100 Percent just on mechanism of injury though, will have to wait for MRI.

Also to the above guys often the anterior drawer (useless) and lachman(way better) are not as reliable right after an injury due to pain causing athletes to tighten up non injured structures making exams less reliable. It's a few days after when they come in after inflammation has calmed down that you really get the awful feeling of a true positive lachman.