Yorkshire have tied down youngsters Alex Lees, Jack Leaning and Dan Hodgson to extended deals at the club.
Batsmen Lees and Leaning and wicketkeeper-batsman Hodgson have signed new contracts until December 2015.
Lees, 20, scored his maiden first-class century this campaign, teenager Leaning made his LV= County Championship bow during the draw against Surrey, while 23-year-old Hodgson has been a regular in the Friends Life t20.
Club director Martyn Moxon told the club’s website: “It is very satisfying that we have managed to get all three players signed up on long-term deals.
"They are progressing nicely into competent cricketers with bright futures at the club for many years to come. We have been delighted with the progress made by the lads this season.
"Alex has established himself in the championship squad and has scored some important runs, including his maiden championship century at Lord’s against Middlesex.
“Dan has scored some important runs for the seconds and contributed in Twenty20 cricket this season.
"Jack is making tremendous progress for the seconds and it won’t be long before he is knocking on the door of the first team.”
Gary Ballance, Steve Patterson and Moin Ashraf and England internationals Jonny Bairstow and Tim Bresnan have already committed their futures to the county this summer.
But the club have confirmed that spinner Gurman Randhawa has not been offered a new deal and will be allowed to leave.