Kettering Town have signed Weymouth's Ben Joyce and ex-Rushden & Diamonds' Max York, and registered caretaker manager Ashley Westwood to play.
Joyce, 22, played in the Poppies' 1-0 defeat to Hayes & Yeading. Midfielder York was an unused substitute. Both join on non-contract terms.
Westwood, 35, also played, having appeared for the Poppies last season, leaving in January 2011.
"With illness and injuries, I've had to step up," he told BBC Northampton.
"Ben looks a decent footballer, he's been around the leagues and he's rediscovered his hunger," said Westwood.
"Max is a good size with good physique. He's steady and he deserves his inclusion in the squad."
Joyce counts Boston United, Torquay and Salisbury amongst his former clubs, and had only joined the Terras on non-contract terms in February.
York joined Diamonds from Histon in July 2010, where he had made six appearances, having started his career with Cambridge United.
Westwood made 20 appearances for League Two side Northampton Town earlier this season, prior to his release by the Cobblers in December and subsequent appointment as caretaker boss at Nene Park in January.
The Poppies are subject to a player registration embargo but can make non-contract signings whilst their active playing squad is below 16.
"We're allowed 16 registered. We've had an illness [Pat Noubissie], a suspension [Jerel Ifil] and injuries. So when they come back, we'll probably lose numbers. We've got to juggle all the time."
Westwood also secured the services of former Luton Town player and latterly youth-team coach, Marvin Johnson, to assist him during the Blue Square Bet Premier match against Hayes & Yeading.
"I've known Marvin since I was 19. I met him at Lilleshall when I was at Crewe Alexandra.
"He's experienced playing wise, he certainly knows what he's talking about and [can] help me out while I'm on the pitch."