Justin Casterline | Getty The Giants have signed former Jets linebacker Zaire Barnes to the practice squad. The New York Giants ‘ joint practices with the New York Jets proved to be a scouting win for general manager Joe Schoen , head coach Brian Daboll , and staff. Saturday, the Giants signed former Jets linebacker Zaire Barnes to the practice squad, after getting an up-close look at the 25-year-old during a pair of joint practices earlier this month. The 6-foot-1 and 227-pound Barnes is