With current NBA players union chief Billy Hunter likely on his way out, longtime sports union executive Donald Fehr could emerge as his ultimate successor, CBS Sports' Ken Berger reports.

Currently the head of the NHL Players Association, Fehr is, "the early preferred pick among multiple agents with enough clout to sway a significant portion of union membership," according to Berger's sources. It's unclear whether that interest goes both ways, but his contract with the NHLPA could be terminated by either side with 60 days notice.

Fehr, 64, represented the NHL players in recent negotiations with the league during the lengthy lockout, eventually completing a deal without losing the entire season. But he is the only sports union chief in history to preside over work stoppages in multiple sports.