Giants' Osi Umenyiora says improved defense is about more than his return

William Perlman/The Star-LedgerGiants defensive end Osi Umenyiora says his return isn't the only reason the defense is playing well of late. Umenyiora is shown above taking a break during today's practice, which was one of the best of the season, according to linebacker Mathias Kiwanuka.By Mike Garafolo - Star Ledger 1/12/12