After a stunning run of form under Phil Parkinson, the Black Cats have seen their odds shorten, but so too have a number of their fellow contenders for the top two. So who are the current favourites? Scroll down and click through the pages to find out who the bookies are backing in League One:
1. Bristol Rovers
Current odds: 66/1 (SkyBet) | Getty Images Photo: Alex Davidson
2. Accrington Stanley
Current odds: 66/1 (SkyBet) | Getty Images Photo: Nathan Stirk
3. Shrewsbury Town
Current odds: 33/1 (SkyBet) | Getty Images Photo: Gareth Copley
4. Gillingham
Current odds: 20/1 (SkyBet) | Getty Images Photo: Jack Thomas