Durham wicketkeeper Phil Mustard and opening batsman Keaton Jennings have agreed new three and two-year contracts at Chester-le-Street respectively.
Mustard, 31, has hit 6,953 runs and claimed 571 victims since making his first-class debut in 2002.
He played 12 limited overs games for England on the 2007-08 winter tours to Sri Lanka and New Zealand.
South Africa-born Jennings, 21, was a regular in
last term's County Championship winning side.
He signed off the season with a century against Sussex and finished the campaign with 707 runs in four-day cricket.