In addition to Östansbo IS, 224 other teams from 35 different countries played in Boys 15. They were divided into 55 different groups, whereof Östansbo IS could be found in Group 55 together with BSV Eintracht Mahlsdorf, Skalborg SK and IF Väster. Östansbo IS continued to Play off B after reaching 4:th place in Group 55. In the playoff they made it to 1/64 Final, but lost it against Oden, IK with 0-1. In the Final, Stångebro United won over Sandarna BK and became the winner of Play off B in Boys 15. Östansbo IS also participated in Boys 14 during Gothia Cup 2015. They reached the 1/64 Final in B14 Play off B, but lost it against Alsike IF with 1-2.