Prior to playing professionally, Brown attended Plant High School and then Oklahoma State University. In his first year with Oklahoma State, in 2005, Brown hit .360 with 13 home runs and 46 RBI in 55 games. The following year, he hit .347 with 13 home runs and 40 RBI, stealing 14 bases. Brown played his final season with Oklahoma State in 2007, hitting .335 with 22 home runs, 71 RBI and 23 stolen bases. He was drafted by the Oakland Athletics in the first round of the 2007 amateur draft and began his professional career that season.

Brown played for the Vancouver Canadians in 2007, hitting .268 with 11 home runs and 48 RBI in 59 games. In 2008, he played for both the Kane County Cougars (85 games, 14 home runs) and the (49 games, 16 home runs), hitting a combined .266 with 30 home runs, 83 RBI and 16 stolen bases. In 2009, Brown spent his entire year with the Midland RockHounds, hitting .268 with nine home runs and 43 RBI. He split 2010 between the RockHounds and Sacramento River Cats, hitting a combined .283 with 15 home runs, 69 RBI and 22 stolen bases.

On December 16, 2010 Brown, with pitcher Henry Rodriguez were traded to the Washington Nationals for Josh Willingham.

He made his major league debut for the Washington Nationals on September 6, 2011, appearing in three games during the season, pinch-hitting three times, without getting on base.

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Wikipedia