Dean Snedker has left the Cobblers after having his contract at the club terminated.
The 20-year-old was out of contract at the end of the season and has not made a first-team appearance during the current campaign.
Snedker, who progressed through the youth system at Sixfields, has made three appearances for the senior side and represented England at under-19 level two years ago.
“It’s a situation where he wanted to be playing football and I understand that at his age,” said manager Chris Wilder. “It’s pretty much the same as the David Moyo one – he’s contract is up at the end of the season and it’s an area we’re looking into pretty extensively.
“Matt Duke’s contract is up in the summer but he’s been an important part of a really good run and I need to look and I need to make decisions.
“We wish Dean all the best.”
Snedker is expected to sign for Conference North side Brackley Town, with whom he has previously spent time on loan.