Hours after winning a playoff game with the Kansas City Chiefs in 2020, tight end Travis Kelce chatted with his older brother, Philadelphia Eagles center Jason Kelce, about the intricacies of blocking defensive linemen while the siblings devoured dinner at a steakhouse.

As they laughed, Travis Kelce’s longtime manager, Aaron Eanes, realized that the moments delighting him could be projected to millions of viewers and listeners. Shortly after the meal, they all started talking seriously about putting together a podcast.

The Kelces, whose teams will face off in a rematch on Monday night, are emblematic of the surge of N.F.L. players who have begun hosting podcasts during the season, a surprising development in a league that tends to suppress individuality.

The next-man-up mind-set is pervasive in a violent sport that requires its athletes to be concealed in helmets, and in a league that enforcesFilled with insights about their performances, off-field adventures and the league’s daily chatter, the podcasts are a direct portal to fans and a way for players to build their brands.

“The football mentality is always, ‘Go, go, go, lock in, lock in,’ nonstop,” Hill said. “We’re coming into a day and age where football players, we want to be monetized, we want to be seen on the big screen. Everything is about branding yourself these days, and if you don’t do that, you’re going to fall behind and miss out.”