In anatomy, the knee is classified as a hinge joint. And Merriam Webster defines the verb ‘hinge’ as “being contingent on a single consideration or point”. Which means the 49ers upcoming season hinges on, well, hinges.
As most Niners fans know by now, the 49ers will have three key players returning from ACL injuries suffered in 2018:
- RB Jerrick McKinnon who was expected to start in 2018 before suffering an ACL tear on the last play of the last practice prior to the start of the season.
- LB Kwon Alexander, signed as a free agent in March, and expected to play a significant role in the 49ers defense in 2019.