Derbyshire pacemen Tony Palladino and Mark Footitt have signed new contracts.
Both players have impressed in a struggling side and have agreed deals until the end of the 2016 season.
Palladino, 31, has scored taken 33 first-class wickets and scored more than 250 runs, while Footitt, 28, has claimed 71 victims in all competitions.
"They will be integral parts of our bowling unit as we build a winning squad for 2015 and beyond," said performance director Graeme Welch.
"When he's on song, Mark adds something different to the bowling unit because he's left-arm and consistently up around 90 miles-per-hour. And I'm sure there's still plenty more to come.
"Tony is a consistent performer in all forms and has proven that he can take wickets in all formats. He also offers a useful batting option down the order."
Footitt began his career with Notts but moved to Derby in 2010, while Palladino arrived from Essex the following year.