Bobby Brown American League Baseball signed in ballpoint ink by Charlie Keller. In mint condition. Charles Ernest Keller (September 12, 1916 – May 23, 1990) was an American professional baseball player. He played as a left fielder in Major League Baseball from 1939 through 1952 for the New York Yankees (1939–43, 1945–49, 1952) and Detroit Tigers (1950–51). A native of Middletown, Maryland, he batted left-handed and threw right-handed. His ability to hit massive fly balls and home runs earned him the nickname "King Kong".Comes with a full Letter of Authenticity from Todd Mueller Authentics.