Brodie Matthews may or may not become part of an unprecedented fourth generation of N.F.L. players from his family. He is only 2 months old.

“We’re going to try to get him something a little more noble than running into somebody for a living,” said his grandfather, Clay Matthews Jr.

No family has infiltrated the league the way the Matthewses have. They might be considered the Mannings for the head-knocking set. For now, five Matthews men have played in the N.F.L., bridging three generations and including the current linebacker Clay Matthews III, whose Packers (11-6) will take the field against the Falcons (13-3) on Saturday in an N.F.C. divisional playoff game. More may be on the way shortly. Odds are decent that Brodie will join them in 2033 or so.

“You know, there’s a Lord in the world that blesses you sometimes,” said Clay Matthews Sr., a defensive lineman for the San Francisco 49ers in the 1950s.