Dozier played baseball for Itawamba Agricultural High School located in Fulton, Mississippi. There he became a local star, it being a town of 4,000. In baseball, he was selected All-State for two years and named "Player of the Year" in north Mississippi. He also received varsity letters in football, golf, and basketball. While playing in high school, he also played for American Legion Baseball's Post 49’s Tupelo 49ers from 2002-2005.

Dozier played baseball for the University of Southern Mississippi, located in Hattiesburg, from 2006-2009. As a freshman, he was named a Freshman All-American and selected to the Conference USA All-Freshman Team. In 224 career games at Southern Miss, he hit .355 with 55 doubles, seven triples, 16 home runs and 152 runs batted in. He was a member of the Southern Miss team that went to the College World Series in 2009.

The Minnesota Twins selected Dozier in the eighth round of the 2009 Major League Baseball Draft. While playing in the Minor Leagues, he was chosen as the Twins Minor League Player of the Year in 2011. The Twins invited Dozier to spring training in 2012. Dozier was called up in May 2012 to replace Justin Morneau. On May 13, 2012, Dozier hit his first career Major League home run off Ricky Romero of the Toronto Blue Jays.

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