 On 19 July 2015, Grella scored his sixth goal of the season in a 2–0 victory over Orlando City.On 11 September 2015, Grella helped New York to a 3–2 come from behind victory over Chicago Fire SC scoring the equalizing goal.On 18 October 2015, in a 4–1 victory over Philadelphia Union, Grella scored 7 seconds into the match, the fastest goal in MLS history, surpassing former Red Bull, Tim Cahill.