Darlington have secured a trio of loan deals ahead of Thursday's deadline.
Nelthorpe, Parker and Kennedy have signed for the season (Getty)
Leeds United defender Ben Parker and Middlesbrough midfielder Jason Kennedy have extended their loans until the end of the season.
The Quakers have also announced the acquisition of Doncaster Rovers midfielder Craig Nelthorpe until the end of the season.
All three of the players would be available should the Quakers be involved in the League Two play-offs.
20-year-old Parker has made seven appearances since linking up with the Quakers in February while Kennedy, 22, spent four months with Livingston before joining up with Dave Penney's side in January.
Nelthorpe, 20, played under Penney when Rovers' were at their former Belle Vue home and rejoins his old boss having spent the last two months with Blue Square Premier side Halifax.