One of the more unfamiliar faces on this list (in a physical sense, especially), defensive midfielder Cabral was signed to moderate excitement. Touted as a strong, skilled presence in the centre of the park, the Cape Verdean became a symbol of the Paolo Di Canio revolution - and it's subsequent failure. Cabral made just one Premier League appearance in a season and a half, taking part in a 1-0 loss against Fulham. He looked decent - and had impressed in pre-season - but mysteriously found himself out of the squad for the remainder of is Sunderland career. Conspiracy theories include a bad smoking habit, issues with fitness, and homesickness. He was released in January 2015, sealing his reputation as one of the most mysterious Sunderland signings ever.
