In the wake of Tuesday’s news that Ravens kicker Matt Stover is leading the charge in connection with the potential replacement of long-term NFL Players Association Executive Director Gene Upshaw, a league source has shared with us some additional details, which suggest that there has been a falling out between Upshaw and former NFLPA president Troy Vincent.

Vincent stepped aside as president of the union, due to the fact that he’s no longer an active player.  And the source says that Eagles safety Brian Dawkins was Vincent’s hand-picked choice to succeed him.  But Dawkins didn’t get the votes.

As a result, turmoil exists.  “There are warring factions in the NFLPA,” the source said.  “Brian Dawkins . . . would have tried to endorse Troy replacing Gene.  Gene protected himself by getting [Titans center Kevin] Mawae in and further pushed Troy away.”  (And this perhaps explains Mawae’s statement of support for Upshaw.)

Indeed, with rumors swirling that Vincent would be named the Assistant Executive Director, Upshaw launched into his No. 1 and No. 2 tirade, insisting that there would be no No. 2 because No. 2 always wants to be No. 1.  The source believes that Upshaw was talking about Vincent. 

Indeed, we’re told that the union quietly has appointed Clark Gaines to the No. 2 position that Vincent had targeted.

Stay tuned.  This once could get interesting.  More interesting.