Mario Williams signed a 6-year deal as a rookie. He wasn't re-signed by Houston, so it's the same thing for all intents and purposes. I'm sure Jenkins would be in Dallas another year if he had another year on his contract. From 2007, there are more first rounders that went to other teams than stayed with the team that drafted them (of the 27 guys that are still in the league, that is). It's not that uncommon. LaRon Landry, Jamaal Anderson, Ted Ginn, Amobi Okoye, Marshawn Lynch, Adam Carriker, Jarvis Moss, Aaron Ross, Reggie Nelson, Brady Quinn, Brandon Meriweather, Robert Meachem, Ben Grubbs, and Greg Olsen all changed teams (14 players).