Sparrow agreed to terminate his contract with Brighton to move to their Sussex neighbours.
He joined Brighton in summer 2010 following more than a decade at Glanford Park and Scunthorpe boss Brian Laws was keen for him to return to the club."I am settled down here, it was a no brainer really", Sparrow said.
In total he scored eight goals in 58 appearances for the East Sussex club.
Source: Iron-Bru.net
Source: FOOTYMAD