I may be using the word bum in a slightly different context than you’re reading it. I wouldn’t use it to describe someone with no talent who may be giving good effort but simply can’t rise to NFL level.
For this discussion, someone who has an established track record like Ertz but returns from an injury, gives zero effort and plays like crap for a team that gave him his career opportunity, while at the same time crying and stomping his feet like a child......is a bum.
The Bills need this guy less than the Sabres need Jeff Skinner.