FLORHAM PARK, N.J. — In many ways, Kacy Rodgers II is just like the dozens of other young N.F.L. players clinging to the margins of the game, trying to secure a spot on a 53-man roster for the start of the season.
What sets him apart is when he accidentally refers to the Jets’ defensive coordinator as “Pops.”
Kacy Rodgers, the elder, is in his fourth season as a coach with the Jets, but this training camp has been unusual. The last time such a paternal relationship existed on an N.F.L. sideline was from 1976 to 1978, when Tampa Bay Buccaneers Coach John McKay coached his son J.