Signed Tuesday 31.07.18
The versatile 23-year-old has signed a two-year deal and can play in a number of positions including central midfield, central defence and right-back.
The former Barnsley player, who won their most promising academy player award in 2008, made 21 appearances for the Tykes.
He got a move to Championship side Ipswich Town in 2016 before making the switch to Mansfield at the end of his one-year contract last summer.
Digby, who has been capped at under 19 and 20 level for England, made his debut for Forest Green off the bench against Grimsby in the opening game of the 2018/19 season having signed just four days prior.