Bosa won't return to the football field until 2021, but a video posted by @MelBear26 on Twitter shows the young pass rusher taking steps toward recovery (h/t to Jessica Kleinschmidt of NBC Sports)
That follows the video below, posted last month by MOTUS Specialists Physical Therapy in Orange County.
The loss of Bosa was the first of many injuries that have decimated the 49ers roster this season.