Wisconsin cornerback Nick Nelson suffered a torn meniscus during a private workout with a team, Ian Rapoport of NFL.com tweets. He’ll undergo surgery to repair his knee next week. 
Although Nelson was not considered to be a prospect on the same tier as Denzel Ward (Ohio State), Jaire Alexander (Louisville), Josh Jackson (Iowa), Mike Hughes (UCF), and Isaiah Oliver (Colorado), he was regarded as a potential Day 2 pick. The injury could push him down to Day 3 territory as he’ll be unable to conduct further workouts between now and the draft later this month.
The good news is that a meniscus tear is not as severe as an ACL tear or other knee ligament injuries. Nelson should be back on the field after 3-4 months, which would put him in line to still play in his rookie season.
Nelson, a Maryland native, began his collegiate career at Hawaii before transferring to Wisconsin. With the Badgers, he made a name for himself as a tireless worker who can stick to a receiver in coverage. However, his lack of ideal size at 5’11” and zero interceptions in three seasons are among the negative marks against him.
Forget private workouts or start taking out insurance.
Tough break for Nick. Some team will get a very good player late into the draft if he does fall to day 3. Would love to see the Packers grab him with their 4th round comp pick.
Hopefully Packers will pick him up as free agent or late round pick reminds me of Jimmy Leonard