Well the only two incidents I can think of is what happened to both Chicago Bear’s DE Lamarr Houston & Detroit Lion’s DE Stephen Tullock. Both were celebrating sacks, & a simple jump & land blew out their knees on non-contact injuries.
These guys r putting so much force on their ligaments play after play that sometimes just a simple push off jump & land, celebrating, can cause their legs to explode. I cringe EVERY time I see this new habit of jumping into teammates to chest or back bump when celebrating. To us it seems minor, but to their bodies it’s literally Russian Roulette & we’ve seen guys get injured from this.