Making his debut for New York at the start of the 2010 MLS season, Ream ended his first professional season having started all 30 matches, while also helping the club capture its second regular season Eastern Conference title.
Upon the conclusion of the 2010 season, Ream was one of three listed candidates for MLS Rookie of the Year, while his impressive club form also earned the defender an international debut as he was called up for the United States’ friendly against South Africa in November 2010.
He would go on to represent the United States in the 2011 CONCACAF Gold Cup the following year.
In December 2011, during the MLS off season, Ream spent a short time training with both Bolton Wanderers and West Bromwich Albion, with permission from the Red Bulls in order to maintain his fitness during the winter break.
Ream impressed enough at BL6 for the Whites to sign him permanently the following month, with the defender cancelling his honeymoon so that the deal could go through.
Having established himself as a mainstay in the Trotters’ defence during the 2013/14 season, Ream's performances also saw him nominated for Sky Bet Championship Player of the Year at the North West Awards.