David Andrew Buchanan (born May 11, 1989), is an American professional baseball pitcher for the Samsung Lions of the KBO League. He has previously played in Major League Baseball (MLB) for the Philadelphia Phillies and for the Tokyo Yakult Swallows of Nippon Professional Baseball (NPB). After growing up in Atlanta, Georgia, Buchanan attended Chipola College from which the New York Mets drafted him in 2009; he did not sign, instead attending Georgia State University. The Philadelphia Phillies drafted Buchanan in 2010, and he quickly moved through their Minor League Baseball (MiLB) system.