Degenek made his Yokohama F. Marinos debut in the opening game of the season, against Urawa Red Diamonds on 25 February 2017. Since making his Yokohama F. Marinos debut, Degenek established himself in the starting eleven for the side and started every matches until he left to join the squad for the FIFA Confederations Cup. He also helped the side goes a 14 matches unbeaten. He then set up a goal for Takashi Kanai to help the side score the only goal in the game, in a 1–0 win over Ventforet Kofu. Despite later being demoted to the substitute bench at the end of the 2017 season, Degenek finished his first season at the club, making 28 appearances in all competitions. For his performance, he was named in the J.League Young Players' Best XI.