 On 14 January 2011, Zerka signed a contract with Greek Superleague club Iraklis until the summer of 2012.He debuted for Iraklis on 23 January 2011, as he was in the starting line-up in a 3–0 away defeat by AO Kavala.Zerka left Iraklis on a mutual agreement after their relegation from the Greek top flight, and he subsequently signed with Major League Soccer club New England Revolution on 18 August 2011.