When it comes to quarterbacks adjusting to almost a completely new group of receivers, it's hard for any non-rookie to match Tom Brady's challenge with the Patriots in 2013. Outside of the returning Julian Edelman, who has been sidelined with an injured right foot, Brady is throwing to all new targets. "When you haven’t really played with anybody for a significant time, or under a lot of pressurized situations, there is definitely a learning curve," Brady said during a break at his Best Buddies football game. "We’re going to try to work through that learning curve as much as we can. The practices have been competitive and we have to be able to keep stringing them together. We have a couple more weeks of spring practice and that will lead into training camp." Free-agent signings Danny Amendola and Michael Jenkins have been the first two receivers in drills over the last two weeks, while former Bills receiver Donald Jones, second-round pick Aaron Dobson, former Titans receiver Lavelle Hawkins, third-year player Kamar Aiken, special-teams captain Matthew Slater and rookie Kenbrell Thompkins have been mostly working behind them. Rookies Josh Boyce (fourth round, TCU) and Mark Harrison (free agent, Rutgers) have been sidelined while recovering from foot injuries.