quarterbacks may be hesitant in the future in reporting symptoms of a concussion, so as to avoid being kaepernick'd by their backups
being replaced by your backup due to injury and never getting your job back despite performing well on the job
"quarterbacks may be hesitant in the future in reporting symptoms of a concussion, so as to avoid being kaepernick'd by their backups" What is the definition of "kaepernick'd"?