seriously? not going to happen. only kickers/special teamers do that. I'd challenge you to find one time in the history of the NFL, a proven veteran has gave his number up to any rookie.
I wonder if this counts (Portis had only played 2 years to this point)
Ohalete ran into some drama in 2004 with Clinton Portis of the Washington Redskins. Portis came to the Redskins in a blockbuster trade that involved Pro Bowl cornerback Champ Bailey. Portis had worn the number 26, and Ohalete had the number. Portis agreed to buy the rights to the number from Ohalete, but Ohalete later sued Portis to force payment. The case was settled before trial, but not before Portis challenged Ohalete to a boxing match to determine the rightful owner of the number. The match never happened.
And let's also not forget Fred McAfee letting Bush get 25 from him