Aaron Samuel Altherr (/ɑːlˈtɛər/ ahl-TAIR; born January 14, 1991) is a German-American professional baseball outfielder who is a free agent. He was drafted by the Philadelphia Phillies in the ninth round of the 2009 Major League Baseball draft. Altherr has played in Major League Baseball (MLB) for the Phillies, San Francisco Giants, and New York Mets. He also played in the KBO League (KBO) for the NC Dinos.