Complex sentence: Though he preferred to return to the Angels, Salmon was aware that he was considered unlikely to make the team's roster, but he saw the opportunity to play with the team during the exhibition season as a chance to potentially audition for other teams.
Split into simpler sentences: Though he preferred to return to the Angels, Salmon was aware that he was considered unlikely to make the team's roster. But he saw the opportunity to play with the team during the exhibition season as a chance to potentially audition for other teams.