04:12 PM ET 05.05 | Free agent defensive end John Abraham took to Twitter on Saturday to express some frustrations regarding his unsigned status. He sent out two tweets, one of which read "Retiring 13," and the other of which simply said "Done." But Abraham isn't going to retire, at least according to NFL.com's Ian Rapoport, who says a source confirmed that there is "nothing to" the tweets from the 13-year NFL veteran. Abraham had a productive year in 2012 with 10 sacks, and figures to have enough left in the tank to produce for another season or two. You don't often see double-digit sack producers sit on the market for this long, so one has to wonder if his asking price is too high.