Whenever possible the Giants as with most teams try to give the benefit of the doubt to their own draft picks when it comes to putting together their roster. That tendency did not help four players yesterday in the first version of the Giants’ 53-man roster. A former second-round pick defensive tackle Marvin Austin was among those waived on cut-down day. A former third-round pick receiver Ramses Barden was put on season-ending injured reserve with a knee injury. A former sixth-round pick safety Tyler Sash was waived/injured with a concussion. Defensive end Adrian Tracy (sixth round 2010) was also cut. In a mild but not overwhelming surprise quarterback David Carr was released beaten out by former Colt Curtis Painter as the Giants will go with Eli Manning Painter and rookie Ryan Nassib as their three quarterbacks. “It’s always difficult to let a guy go that you’ve had with you for a while” coach Tom Coughlin said. This will not be the Giants’ final roster. Teams can start making waiver claims today and a player seemingly safe on the 53 one day can find himself on the way out the next.