Ryan Howard retires from baseball, Baseball
Former Phillie Ryan Howard announces retirement - ESPN
Ryan Howard Announces Retirement - MLB Trade Rumors
Ryan Howard – Society for American Baseball Research
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Ryan Howard Signed Philadelphia Phillies MLB Retirement Baseball JSA
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Ryan Howard Signed Philadelphia Phillies MLB Retirement Baseball JSA
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Not in Hall of Fame - Ryan Howard Retires
Ryan Howard announces retirement from baseball
Ryan Howard Signed Philadelphia Phillies MLB Retirement Baseball JSA
Former Phillies first baseman, 3-time All-Star Ryan Howard officially announces his retirement
Ryan Howard Praises Phillies Fans in Retirement Announcement