England batsman Jonny Bairstow is among five players to sign contract extensions with Yorkshire.
The 23-year-old, who can keep wicket, has lengthened his deal with the White Rose until the end of 2015 along with England Lions batsman Gary Ballance, 23, and 29-year-old seamer Steven Patterson.
Former England Under-19 captain Azeem Rafiq, a 22-year-old off-spinning all-rounder, and paceman Moin Ashraf, 21, have penned one-year extensions until the end of the 2014 season.
Yorkshire director of cricket Martyn Moxon said: "We are delighted that all five players have signed contract extensions.
"They have all come through the Yorkshire system and have established themselves in the team. In Jonny's case he is firmly part of the England programme and that is testament to his efforts in his development as a cricketer.
"These lads can become cornerstones of the side for a number of years and along with the other players we have on long-term deals that is very exciting for Yorkshire cricket."