I thought it would be fun to try and figure out who this is - he states he currently plays in the NFL, so he must currently be on a roster (he could be lying too)
In the twitter feed he mentions that he entered the league the same year that Witten did - 2003. That does narrow the choices down dramatically. It would have to be a good player to be able to last in the league for 10+ seasons
Someone guessed Andre Johnson - and his reply was "Nope....nice guess though" implying that he is a receiver.
My first guess was Anquan Boldin - but if you look at his reply to the ranking of Ngata - "Haloti Ngata, DT I don't think he gets enough credit! That Ravens D don't scare me if he not out there!". Does not strike me as something that a former teammate would say.....
I noticed that when this player talked about entering the league the same year as Witten, he said "Jason Witten came out the same year that I did....". Interesting he chose the term "came out" rather than drafted. His focus on Witten (plus he seems to enjoy making fun of Tony Gonzalez's age) seems to also indicate that he may may also be a TE
TE that entered the league in 2003 - undrafted, yet still playing? This HAS to be Antonio Gates
(Not that it really matters - but this has been a LONG offseason)