He has played in Major League Baseball (MLB) for the Toronto Blue Jays, Texas Rangers, Arizona Diamondbacks, Tampa Bay Rays and Boston Red Sox.

[1][2] After graduating from L. D. Bell High School, Roberts' team won an NJCAA Division III World Series his sophomore year at Eastfield Junior College in Mesquite, Texas.

In 2003, Baseball America analyst John Manuel described Roberts as the best player on UTA's squad which also included Hunter Pence.

[5] The Blue Jays allocated Roberts to the Arizona Fall League that off-season,[6] and on November 18 of that year, they purchased his contract from the New Hampshire Fisher Cats and added him to their 40-man roster.

[8] In game 4 of the 2011 NLDS against the Brewers, Roberts hit a two-out grand slam in the first inning to help keep the Diamondbacks alive in the postseason.

During this walk-off grand slam, Roberts began pumping his left arm in a salute to the teams' manager Kirk Gibson's 1988 World Series game one home run.

Hours after being designated for assignment on July 24, Roberts was traded to the Tampa Bay Rays for minor league infielder Tyler Bortnick.

On August 15, 2013, Roberts was designated for assignment by the Rays to make room for pitcher Alex Cobb who was coming off the DL.