Former Nottinghamshire batsman Scott Elstone has signed a one-year incremental contract with Derbyshire after impressing in the Second XI in 2013.
The Falcons agreed terms with the 23-year-old but have released Alasdair Evans, whose one-year contract has come to an end.
Batsman Ben Slater has also not been offered a contract at the present time.
Elstone scored 872 runs at an average of 35, including four fifties and one hundred, during an extended trial period in 2013, as well as making his Derbyshire debut in the Yorkshire Bank 40 match versus Essex.
Burton-born and a product of the Nottinghamshire Academy, Elstone played 34 limited-overs matches for the Outlaws prior to departing Trent Bridge in 2012.
He has averaged 35.83 in one-day cricket for the Unicorns this season including a top score of 75 not out, from 78 balls, versus Somerset.
“Scott’s got a big chance now,” head coach Karl Krikken said. “He’s done well in the Second XI this season, he looks a really good pro, he’s got a lot of talent and good luck to him;
“I hope this is the start of a long Derbyshire career.”
Krikken, meanwhile, thanked Evans and Slater for their efforts in a Derbyshire shirt.
Slater’s impressive start to the season in Second XI cricket earned him a run in the first team during the latter part of the 2013 season, where he contributed 335 first-class runs, in ten matches, at an average of 19.70.
Evans, meanwhile, was limited to five first team appearances in all competitions but was a regular in Second XI cricket throughout the year.
Krikken said: “Ally and Ben have worked their socks off this year and the effort they’ve put in makes these decisions very difficult.
“But we have to balance our budgets and we need to tweak the squad ahead of the new season; to do that we have to make some big calls.
“One of those calls is that Ally will be leaving the club and – at present - we’re not in a position to offer Ben a contract either.”