Wily Mo Pena played in MLB for the Cincinnati Reds, Boston Red Sox, Washington Nationals, Arizona Diamondbacks and Seattle Mariners. He was considered a pure power hitter best known for his long-distance home runs and high strikeout rate. Wily Mo Pena has hand signed this Official Rawlings Major League Baseball (Selig). Certificate of Authenticity from Athlon Sports Collectibles. Pristine Bold Blue Sweet Spot Signature.