Batsman Keaton Jennings and pace bowlers Callum Thorp and Jamie Harrison have all agreed new contracts at Durham ahead of the 2013 season.
South African-born left-hander Jennings has put pen-to-paper on a new two-year deal after a breakthrough season in 2012, while veteran paceman Thorp and 21-year-old Harrison have inked one-year deals.
Jennings made five first-class appearances for Durham last summer, earning a call-up to the first team after posting two double-centuries for the second XI, where he was named player of the season.
Thorp, who joined the club back in 2004, has prolonged his Durham career for a further year after claiming 38 wickets in 13 LV= County Championship Division One matches last term.
Academy graduate Jamie Harrison, a left-arm pace bowler, made his first-class debut against Somerset last May and will be hoping to challenge for further honours in 2013.