It's not uncommon for NFL coaching staffs to have an outside perspective with a view to improvement.
The approach could include former coaches and players, all of whom are a valuable resource of information.
"We find every way possible to improve our football team," Bills coach Sean McDermott said Tuesday, via the team's official website. "This is no different. Jim is a Hall of Famer. To me it would be ignorant of us not to have a relationship of Jim and ask him what he thinks knowing we have a young quarterback. All of that is healthy and all of that is good."
Kelly revealed Monday to the Buffalo News that he has met with Bills offensive coordinator Brian Daboll, whom McDermott emphasized would call plays, and quarterbacks coach Ken Dorsey during the offseason.
As it turns out, the Bills plan to incorporate some of the "K-Gun" philosophies within the current offensive scheme.
Kelly obviously had an edge in development by the time he joined the Bills in 1986 after spending two professional seasons with the Houston Gamblers of the USFL. And Kelly had the benefit of being surrounded by fellow Hall of Famers Thurman Thomas and Andre Reed in Buffalo.
Still, Kelly sees plenty to like about Allen and has remained steadfast in Allen's corner since the Bills selected the young signal-caller in the first round of the 2018 draft. Kelly has often lavished praise for Allen's arm and overall skill set, and this year is no different.
"I love the way he plays," Kelly told the Buffalo News. "He's 10 times the athlete I ever thought about being."
There is well-placed optimism for Allen's future in Buffalo, of course. And the Bills built around Allen during the offseason with the additions of running back Frank Gore and wide receivers Cole Beasley and John Brown in free agency. The Bills also have running back LeSean McCoy and wide receiver Zay Jones returning.
Whether Allen takes the next step as many project remains to be seen, but he's set up to possess the tools and knowledge of the old "K-Gun" offense to succeed with Kelly's input.