Rengsjö SK was one of 395 clubs from Sweden that had teams playing during Gothia Cup 2013. They participated with one team in Boys 15. In addition to Rengsjö SK, 176 other teams from 33 different countries played in Boys 15. They were divided into 44 different groups, whereof Rengsjö SK could be found in Group 34 together with Panevėžio FA, Rotenburger SV and Tidaholms GIF. Rengsjö SK continued to Play off A after reaching 2:nd place in Group 34. In the playoff they made it to 1/64 Final, but lost it against Austin Lonestars 98B Howard with 0-2. In the Final, Club América won over J-L Juniors and became the winner of Play off A in Boys 15. Rengsjö SK comes from Bollnäs which lies approximately 480 km from Göteborg, where Gothia Cup takes place. The area around Bollnäs does also provide two additional clubs participating during Gothia Cup 2013 (Bollnäs GIF and Söderhamns FF).