The NFL says it "cannot conclude" that the Washington Redskins committed a tampering violation before signing defensive tackle Albert Haynesworth last offseason. The league also said Tuesday the Redskins assured the NFL that the team will "re-emphasize" with its executives the importance of following rules about tampering, which can result in fines and forfeiting draft picks. The league says it conducted "an extensive review" of the Haynesworth case.