Stefan Galinski has penned a Boston United deal.
The 19-year-old - a Polish youth international - came through the Rams’ youth system and penned a pro contract, although he never saw first-team action at Pride Park.
He has also played for Corby Town.
“We are really pleased to get hold of Stefan,” said boss Dennis Greene.
“He had been on trial at higher placed clubs, so we have had to wait to get our man — but we are delighted to eventually do so.”
Galinski missed last night’s 4-1 warm-up defeat to Cambridge United due to a dead leg.
However, he is expected to return to action on Saturday, when United host Mansfield Town (KO 3pm).
Galinski’s injury and Scott Garner’s unavailability meant that Charlie Ward was named among the Boston substitutes last night.
The younger brother of ex-Pilgrim defender Tom was given the final 12 minutes, whe he replaced Conor Marshall.
Greene added: “He’s a lad that’s been highly reccommended within the set up of Boston United and we were a couple of defenders short, so it was a great opportunity to give him 15 minutes.
“You can’t tell too much in that period, but hopefully the lad’s learned a lot from it and it’ll give him a boost.”