After graduating from Madison High School, Mortensen went to Treasure Valley Community College, then Gonzaga University. He played college baseball for the Bulldogs from 2006–2007.\n', '

Mortensen was drafted by the St. Louis Cardinals 36th overall in the 2007 Major League Baseball Draft.\n', '

He was invited to spring training 2009, but began the season in the minors. He was called up to the major leagues for the first time on June 29, 2009.\n', '

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