Born and raised in McComb, Mississippi, Dyson attended McComb High School, where he starred in baseball and football as a running back. At McComb, Dyson earned All-Division honors but was passed over by most scouts due to his slight stature. Dyson later attended Southwest Mississippi Community College. At Southwest, Dyson tied the single-season record with seven triples and set a record with 47 runs.

Dyson was drafted by the Royals in the 50th round, 1,475th overall, of the 2006 amateur draft. He signed with the team for $5,000. Dyson began his professional career that year, playing for the AZL Royals and hitting .273 with no home runs and 19 stolen bases in 51 games. He played in 10 games in 2007, all for the Burlington Bees, hitting .270.

He spent 2008 with the Wilmington Blue Rocks, hitting .260 with 39 stolen bases in 93 games. He split the 2009 season between the Bees (17 games) and Northwest Arkansas Naturals (63 games), hitting a combined .276 with 46 stolen bases. He began 2010 in the minor leagues, splitting the season between the AZL Royals, Blue Rocks, Naturals and Omaha Royals. He hit .299 with 24 stolen bases in 71 games.

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