Bills agree to three-year contract with linebacker A.J. Klein
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Saints free agent linebacker A.J. Klein agrees to contract with Bills – Crescent City Sports
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Bills re-sign A.J. Klein - NBC Sports
Source -- Former Saints LB A.J. Klein joining Bills on 3-year deal - ESPN
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AP source: Buffalo Bills LB Matt Milano to test free agency
Buffalo Bills re-sign linebacker A.J. Klein to one-year deal
Bills agree to terms with linebacker A.J. Klein