Auburn Doubledays
In 2006, Campbell was drafted in the 10th round of the 2006 Major League Baseball draft by the Toronto Blue Jays as the 300th pick overall and signed a seven-year contract with the club. Campbell started his professional career playing in the New York–Penn League for the rest of 2006 with the Auburn Doubledays where he had a successful season, batting at .292 in 68 appearances.