Nelson said Janis, who has had a quieter camp than Adams and Abbrederis, has made significant progress in his quest to win Rodgers' trust and has shown a better understanding of the system this summer.
"I think he's confident. To me, he's doing a great job of understanding what needs to be done and taking the coaching and working on it and having the comfort level," Nelson said. "You can see him taking the coaching points, whether it's from Aaron or Luke [Getsy, the team's receivers coach]. You see it out on the field. So that's a positive on all aspects."
As for Janis' progress with Rodgers, Nelson replied, "It just takes time. It's consistency again. It's not one day, it's not one meeting, it's not even one week. It's week after week after week, year after year after year."
Nelson has been impressed with what he has seen from Adams, who struggled last season after taking over for Nelson in the starting lineup and battled ankle and knee injuries throughout the year.
"He looks good. I think he's playing with more confidence, playing with more speed -- and playing healthy, which makes a big difference with him," Nelson said. "But again, it's the consistency factor with every play, you've got to make it."