Yorkshire hand England Under-19 stars Will Rhodes, Ben Coad, Jonathan Tattersall and Oliver Robinson new contracts.
Durham will start the defence of their County Championship title with an away game against Northants on 13 April next year.
Yorkshire will not be renewing the contract of opening batsman Phil Jaques, who will now become a coach in Australia.
Gary Ballance's second ton of the game guides Yorkshire to a draw against a Surrey side inspired by Dominic Sibley's 242.
BBC commentators select and give the lowdown on county cricket's best XI of 2013
Surrey's Dominic Sibley becomes the youngest player to hit a double century in the County Championship against Yorkshire.
Gary Ballance scores a season's best 148 as Yorkshire post 434 before Surrey's openers hit back to close on 172-1.
Fresh from his inclusion in England's Ashes squad, Gary Ballance hits 72 not out as Yorkshire reach 316-6 against Surrey.
Yorkshire sign New Zealand batsman Kane Williamson as their overseas player for next year.
Yorkshire beat Middlesex by 80 runs to secure second place in their first season back in Division One.
Yorkshire build a 212-run lead over Middlesex, but saw their Championship challenge end as Durham win the title.
Yorkshire bowler Ryan Sidebottom signs a new deal with the county to take him through to the end of the 2015 season.
Yorkshire's seamers dismiss Middlesex for 128 but their title hopes look over with Durham poised for victory over Notts.
All-rounder Richard Pyrah signs a new contract that will keep him at Yorkshire until at least December 2015.
Yorkshire close on 109-3 against Middlesex as Andrew Gale's 66 rescues them from 1-2 before the bad weather.
Yorkshire captain Andrew Gale believes there could still be a late twist in the County Championship title race.
Sussex's Chris Nash hits an impressive 167 but rain scuppers title-chasing Yorkshire's hopes of victory at Hove.
Ashar Zaidi takes four wickets on his Sussex debut, but title-chasing Yorkshire still end the day on top at Hove.
Kane Williamson hits 80 not out and Adam Lyth makes a half century as Yorkshire edge towards Sussex's total at Hove.
Sussex wicketkeeper Ben Brown hits an unbeaten 78 to frustrate title-chasing Yorkshire on day one at Hove.