Korona Kielce reportedly faced competition from another Ekstraklasa team, Motor Lublin, for the signing of 23-year-old Polish defender Ariel Mosór from Raków Częstochowa. According to Damian Wysocki, a journalist from wKielcach.info, Motor offered the defender more attractive financial terms, but the player chose the offer from Kielce as they were the first to enter talks and were very determined. However, Motor Lublin's vice-president, Łukasz Jabłoński, clarified that while his club was very interested in the player, they never discussed financial terms or contract length. He explained that neither Mosór nor his agent received a formal offer because the player had already committed to Korona Kielce by the time Motor expressed interest. Jabłoński added that both the defender and his agent acted fairly throughout the process, which he publicly commended. Mosór has 25 caps for the Poland U21 team, has a contract with Raków Częstochowa until June 30, 2028, and his current Transfermarkt market value is €600k. In July 2026, reports indicated an imminent transfer to Korona Kielce for approximately €500,000. During the winter 2026 window, GKS Katowice had reportedly submitted an unsatisfactory offer for the player.