In a move that ostensibly ends the Tampa Bay Buccaneers' attempts to lure quarterback Jake Plummer out of retirement, the team has formally commenced the process of attempting to recover a portion of the 10-year veteran's signing bonus. And they have been joined in the grievance procedure by the Denver Broncos, his former employer and the franchise that originally funded the bonus. Tampa Bay officials, who placed Plummer on the league's "reserve/did not report" list when he failed to show for the start of camp, had hinted at such a maneuver. In a contractual technicality, when the Bucs acquired Plummer from Denver in March for a seventh-round draft pick, which could have escalated to a fourth-rounder if he did not retire, they also gained the right to try to recoup part of his signing bonus money.