Jarrett's lack of production thus far is not a virtue of laziness or poor work ethic, not last season, at least.
As we know, the Panthers' offense is primarily predicated on the run, so three or four receiver sets are not a big part of their playbook. Still, in very limited action he's proven to be an effective run blocker who can provide a dangerous weapon on third downs. It wouldn't surprise me if he saw more time in the No. 2 role this season where he would see significant looks for a team desperately searching for another receiving threat, especially considering Muhammad is 36 years old.
It's all a matter of getting on the field, and if successful in that regard, 50-60 catches is certainly a realistic benchmark for us to expect.