Carlos Isaac moved to Ekstraklasa club Widzew Lodz from Cordoba through the activation of a one million euro release clause. According to Tomasz Włodarczyk from Meczyki.pl, the clubs had at one point agreed on a 500 thousand euro fee, but Cordoba, which may compete for promotion to LaLiga, ultimately decided not to let Carlos Isaac leave for that amount. Because Widzew Lodz wanted Carlos Isaac immediately, the club paid the one million euro clause. The player signed a contract with Widzew Lodz until June 30, 2028, which includes an option to extend for another twelve months.

The signing of Carlos Isaac was announced by Widzew Łódź. His release clause from Córdoba CF was one million euro.

Carlos Isaac has left Córdoba after unilaterally terminating his contract and paying his release clause. According to sources close to the Andalusian club, he is to join Widzew Lodz of the Polish top division. In a brief statement, Córdoba confirmed the departure of Carlos Isaac, thanked him for his professionalism and effort, and wished him luck in his future professional and personal endeavors. Before a match against Málaga, Coach Iván Ania stated that it was normal for Carlos Isaac not to be available due to the imminent operation.

Rafael Cano, a journalist for 'Diario Cordoba', stated to Goal.pl that Widzew Łódź has decided to pay the one million euro release clause for Carlos Isaac from Córdoba CF. According to Cano, the transaction is in its final stages. He reported that Carlos Isaac has traveled to Madrid to finalize formalities and is to fly from there directly to Widzew's training camp in Turkey. Cano confirmed through his sources that Widzew will pay the release clause because Córdoba does not want to negotiate for a lower amount. The journalist also noted that Córdoba would have extended Carlos Isaac's contract if no other club had appeared, as the club is very satisfied with him and the player feels very good in the city and the club.