Marcus T. Hallberg is an American professional baseball bench coach in Major League Baseball (MLB) for the Minnesota Twins. A former infielder. During his junior and senior seasons in high school, Hallberg did not strike out once. He then batted .362 in his three-year college career. In 2006, he was the toughest batter in the NCAA to strike out, at once every 36 at-bats. The Arizona Diamondbacks selected Hallberg in the ninth round of the 2007 MLB draft. He played five seasons in the minor leagues, before turning to coaching and managing. He previously served as the first base coach for the San Francisco Giants.