Hayles comes to the lane with team mate Jon Harley, both signing a three year deal.
Barry Hayles: Blades New Signing
The Jamaican International is now aged 32 and has played at Conference level as well as in the Premier League.
It was believed that Leeds would win the race with there higher wage demand but with a longer contract and better incentives it seems as though Hayles would rather play than sit back and earn cash for nothing.