Darville (20) appeared for the Minstermen during pre-season and has recently had a loan spell at League One side Tranmere Rovers. But he has now joined York until the end of the campaign after being released from Elland Road.
Meanwhile, Kerr (29) is a vastly experienced performer with in excess of 300 senior appearances at Lincoln and formerly Scarborough. He has agreed an eighteen-month deal at Bootham Crescent.
York boss Gary Mills has also allowed Jamal Fyfield to return on loan for a month to his former club Maidenhead United, while striker George Purcell has been sent out to Eastbourne Borough until the end of the season.
Scott Kerr (right) will bring plenty of experience in midfield to the Minstermen