Complex sentence: From then on he devoted himself to playing for several teams in the Second Division until his official retirement from the game in 1957; however, he continued playing football with the veteran players of Biscay, donating the money collected from these games to charities.
Split into simpler sentences: From then on he devoted himself to playing for several teams in the Second Division until his official retirement from the game in 1957. Despite officially retiring from the sport, he continued playing football with the veteran players of Biscay, donating the money collected from these games to charities.