Kacper Kostorz was loaned to NAC Breda in the summer of 2023. Despite initial interest due to his impressive performance on loan at FC Den Bosch, where he scored 16 goals and provided six assists in 39 appearances, his performance at NAC Breda has been disappointing. He has played 14 matches, totaling 427 minutes on the field, and scored only one goal. NAC Breda included a purchase option in the loan deal, but given his current underwhelming performance, they are unlikely to activate it.