Red / Red /
In addition to Kalmar FF, 31 other teams played in SEF Trophy. They were divided into 8 different groups, whereof Kalmar FF could be found in Group 3 together with Landskrona BoIS, Östersunds FK and Västerås SK Fotboll. Kalmar FF continued to Play off A after reaching 1:st place in Group 3. In the playoff they made it to 1/4 Final, but lost it against IF Brommapojkarna with 0-2. In the Final, IF Brommapojkarna won over BK Häcken and became the winner of Play off A in SEF Trophy. Kalmar FF also participated in SEF Trophy during Gothia Cup 2018. They reached the 1/8 Final in SEF Play off A, but lost it against IFK Göteborg with 0-2.