Three years later, he was drafted in the fourth round of the 2000 Major League Baseball Draft by the Kansas City Royals.
After high school he was selected in the fifth round of the 2000 Major League Baseball Draft by the Chicago Cubs and played right field for three years as part of the Cubs' minor league system.
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Harrington was regarded as one of the top talents available in the 2000 Major League Baseball Draft, and he chose agent Tommy Tanzer as his representative.
He was drafted by the Chicago White Sox in the 2000 Major League Baseball June Amateur Draft and was also recruited by Houston Nutt to play college football for the Arkansas Razorbacks.