Stay up-to-date with the latest player releases, signings and speculation from all the counties for the 2010 season.
In a change to the regulations, counties will be allowed to field two overseas players in Twenty20 games in 2010, with up to four registered for that competition - although only two can be registered at any one time, and registrations must be for a minimum of 10 days.
Only one overseas player is permitted in the County Championship and Clydesdale Bank 40 League.
KPK: Kolpak contract, REL: released, RET: retired, YTH: from youth teams, EUP: European Union passport, UKP: recently-obtained UK passport. Also shows, where relevant, players' previous counties
Kolpak contracts are signed by foreign players, using a loophole in European Union law to avoid counting against the quota of one overseas player per club.
Players who moved counties during the 2009 season are included on
the 2009 list.
Have we missed anyone? Please let us know.
Overseas player: Chris Rogers (Australia); Loots Bosman (South Africa, for Twenty20); Charl Langeveldt (South Africa, for Twenty20)
Ins: Robin Peterson (South Africa, KPK), Steffan Jones (Somerset), Lee Goddard (Durham), Mark Footitt (Nottinghamshire), Wes Durston (ex-Somerset, has played for Unicorns this season), Steve Adshead (Herefordshire)
Outs: Stephen Stubbings (REL), Dan Birch (REL), Dom Telo (REL), James Pipe (RET), Wavell Hinds (REL), Mark Lawson (REL, has joined Kent on trial), Stuart Law (REL), Lee Goddard (REL on 10 August), John Sadler (REL on 20 August)
Other news: Greg Smith replaced Chris Rogers as captain on 17 August. Derbyshire became the "Falcons" in one-day cricket in 2010, having previously been the "Scorpions" (1999-2004) and "Phantoms" (2005-2009).
Overseas player: Albie Morkel (South Africa, for Twenty20); Ross Taylor (New Zealand, for Twenty20)
Ins: Michael Richardson (MCC Young Cricketers), Ben Stokes (YTH), Ruel Brathwaite (trial)
Outs: Lee Goddard (Derbyshire), Paul Wiseman (RET), Luke Evans (Northants, month's loan from 14 April)
Other news: Phil Mustard replaced Will Smith as captain on 14 May.
Overseas player: Chris Martin (New Zealand, until 7 May); Danish Kaneria (Pakistan, 7 May until early July, then from Twenty20 finals day for the rest of the season); Scott Styris (New Zealand, for Twenty20); Bryce McGain (Australia, 25 July until early August); Dwayne Bravo (West Indies, for Twenty20 finals day)
Ins: Billy Godleman (Middlesex), Max Osborne (YTH), Michael Comber (YTH), Andy Carter (Nottinghamshire, month's loan from 11 July)
Outs: Varun Chopra (Warwickshire), Jason Gallian (RET), Jahid Ahmed (REL), James Middlebrook (Northants), Mervyn Westfield (REL on 20 August), John Maunders (REL on 20 August)
Other news: James Foster replaced Mark Pettini as captain in July.
Overseas player: Mark Cosgrove (Australia); Shaun Tait (Australia, for Twenty20)
Ins: David Brown (Gloucestershire), James Allenby (Leicestershire), Nick James (ex-Warwickshire, has signed a contract after successful trial spell), Chris Cooke
Outs: Alex Wharf (RET), Ryan Watkins (REL), Mike O'Shea (REL)
Overseas player: James Franklin (New Zealand); Ian Butler (New Zealand, for Twenty20); Aaron Redmond (New Zealand, for Twenty20)
Ins: Jon Batty (Surrey), David Payne (YTH), Chris Dent (YTH), Louis Gegg (YTH), Liam Norwell (YTH), Ed Young (Oxford MCCU)
Outs: Stephen Adshead (Herefordshire), Grant Hodnett (REL), Matthew Gitsham (REL), David Brown (Glamorgan), Craig Spearman (REL), Tom Stayt (REL)
Other news: Gloucestershire's former New Zealand batsman Hamish Marshall has held talks about representing Ireland, for whom he qualifies to play from April 2011.
Overseas player: Rangana Herath (Sri Lanka, first part of season); Abdul Razzaq (Pakistan, for Twenty20); Daniel Christian (Australia, for Twenty20 and rest of August); Phillip Hughes (Australia, from 31 August until end of season)
Ins: Simon Jones (Worcestershire), Michael Bates (YTH), Kabir Ali (Worcestershire), Neil McKenzie (KPK)
Outs: Imran Tahir (Warwickshire), John Crawley (RET), Billy Taylor (REL), Tom Burrows (REL), Tom Parsons (REL), Chris Morgan (REL), Chris Tremlett (Surrey), Kevin Pietersen (Surrey, loan from 31 August)
Other news: Hampshire officially became the "Royals" in one-day cricket this season.
Overseas player: Makhaya Ntini (South Africa, from 27 April); Malinga Bandara (Sri Lanka, from 3 June)
Ins: Adam Ball (YTH), Dewald Nel (Scotland), Ashley Shaw (Cheshire), Mark Lawson (Derbyshire, on trial)
Outs: Martin Saggers (RET), Ryan McLaren (REL), Justin Kemp (REL), Rob Ferley (REL on 28 July), Warren Lee (REL on 28 July), James Hockley (REL on 11 August), Phil Edwards (REL on 24 August)
Overseas player: Ashwell Prince (South Africa, first part of season); Simon Katich (Australia, for month of June); Nathan McCullum (New Zealand, for Twenty20); Shivnarine Chanderpaul (West Indies, from 20 July)
Ins: Stephen Moore (Worcestershire), Luke Procter (YTH), Gary Montgomery, Daren Powell (KPK)
Outs: Mal Loye (Northants), Steven Mullaney (Nottinghamshire), Francois du Plessis (REL), Steven Cheetham (Surrey, loan from 4 August until end of season)
Overseas player: Andrew McDonald (Australia); Brad Hodge (Australia, for Twenty20)
Ins: Matthew Hoggard (Yorkshire), Will Jefferson (Nottinghamshire), James Benning (Surrey)
Outs: Iain O'Brien (Middlesex), James Allenby (Glamorgan), HD Ackerman (REL), Boeta Dippenaar (REL), Carl Crowe (REL)
Other news: Claude Henderson, the first Kolpak signing in county cricket, has been granted British citizenship.
Overseas player: Iain O'Brien (New Zealand); Adam Gilchrist (Australia, for group stages of Twenty20); David Warner (Australia, for Twenty20)
Ins: Iain O'Brien (Leicestershire), Paul Stirling (Ireland), Scott Newman (Surrey), Tom Smith (Sussex), Josh Davey (YTH), Toby Roland-Jones, Pedro Collins (Surrey, KPK)
Outs: Nick Compton (Somerset), Billy Godleman (Essex), David Nash (RET), Alan Richardson (Worcestershire), Chris Silverwood (REL, has joined Essex as bowling coach), Murali Kartik (Somerset), Ben Scott (Worcestershire, loan from 3 April to 23 June)
Other news: Shaun Udal stepped down as skipper in June, and was replaced temporarily by Adam Gilchrist until Neil Dexter took on the role permanently. Tyron Henderson, who had left the county after the 2009 season, had returned on a short-term deal in 2010 to play Twenty20 cricket.
Overseas player: Chaminda Vaas (Sri Lanka, 24 May until end of Twenty20 campaign); Elton Chigumbura (Zimbabwe, for Twenty20 and remainder of season); Lou Vincent (New Zealand, for Twenty20)
Ins: Mal Loye (Lancashire), James Middlebrook (Essex), Vishal Tripathi (ex-Lancashire 2nd XI, on initial three-month deal), Luke Evans (Durham, month's loan from 14 April), Tom Brett (YTH), David Burton (ex-Middlesex)
Outs: Mark Nelson (REL), Shaun (aka "Bud") Bailey (REL), Steven Crook (REL), Ryan Cummins (REL), Graeme White (Nottinghamshire), Monty Panesar (Sussex), Johan van der Wath (REL), Riki Wessels (REL)
Other news: Andrew Hall replaced Nicky Boje as captain in mid-May.
Overseas player: Hashim Amla (South Africa, until mid-May); David Hussey (Australia, 4 June until mid-August); Dirk Nannes (Australia, for Twenty20); Adam Voges (Australia, late August until end of season)
Ins: Neil Edwards (Somerset), Graeme White (Northants), Steven Mullaney (Lancashire), Scott Elstone (YTH), Jake Ball (YTH)
Outs: Mark Ealham (RET), Will Jefferson (Leicestershire), Mark Footitt (Derbyshire), Jason Brown (REL), Andy Carter (Essex, month's loan from 11 July)
Overseas player: Damien Wright (Australia, first month of season); Murali Kartik (India, from mid-May); Cameron White (Australia, for Twenty20); Kieron Pollard (West Indies, for Twenty20)
Ins: Murali Kartik (Middlesex), Nick Compton (Middlesex), James Hayman (YTH)
Outs: Neil Edwards (Nottinghamshire), Andy Caddick (RET), Carl Gazzard (RET), Justin Langer (RET), Omari Banks (REL), Steffan Jones (Derbyshire), Wes Durston (Derbyshire)
Overseas player: Rao Iftikhar Anjum (Pakistan, first three games of season); Younus Khan (Pakistan, until mid-July); Andrew Symonds (Australia, for Twenty20)
Ins: Steven Davies (Worcestershire), Gareth Batty (Worcestershire), Rory Hamilton-Brown (Sussex), Chris Tremlett (Hampshire), Steven Cheetham (Lancashire, loan from 4 August until end of season), Kevin Pietersen (Hampshire, loan from 31 August)
Outs: Alex Tudor (REL), Pedro Collins (Middlesex), Jon Batty (Gloucestershire), Scott Newman (Middlesex), Mark Butcher (RET), Jimmy Ormond (REL), Chris Murtagh (REL), Murtaza Hussain (REL), James Benning (Leicestershire), Laurie Evans (REL on 10 August)
Other news: Surrey became the "Lions" again in one-day cricket in 2010, as they were between 1999 and 2005, having also been the "Brown Caps" (2006-2009) since counties adopted one-day nicknames in 1999.
Overseas player: Rana Naved-ul-Hasan (Pakistan, until mid-May); Yasir Arafat (Pakistan, from mid-May); Dwayne Smith (West Indies, for Twenty20); Brendon McCullum (New Zealand, for Twenty20)
Ins: Monty Panesar (Northants), James Anyon (Warwickshire), Luke Wells (YTH), Matt Machan (YTH), Lewis Hatchett (YTH)
Outs: Carl Hopkinson (joined coaching staff), Jason Lewry (RET), Tom Smith (Middlesex), Piyush Chawla (Surrey), Rory Hamilton-Brown (Surrey), Pepler Sandri (REL), Robin Martin-Jenkins (retired on 19 July)
Overseas player: Imran Tahir (Pakistan)
Ins: Varun Chopra (Essex), Imran Tahir (Hampshire)
Outs: Tony Frost (RET), James Anyon (Sussex)
Overseas player: Phil Jaques (Australia, first half of season); Shakib Al Hasan (Bangladesh, from July onwards); Steve Smith (Australia, for Twenty20); Sanath Jayasuriya (Sri Lanka, for Twenty20)
Ins: Ben Cox (YTH), Jack Shantry (YTH), Alan Richardson (Middlesex), Ben Scott (Middlesex, loan from 3 April to 23 June), James Cameron (UKP), Shaaiq Choudhry
Out: Steven Davies (Surrey), Gareth Batty (Surrey), Simon Jones (Hampshire), Stephen Moore (Lancashire), Ian Fisher (REL), Mehraj Ahmed (REL), Josh Knappett (REL), Kabir Ali (Hampshire)
Other news: Daryl Mitchell replaced Vikram Solanki as captain in August.
Overseas player: Tino Best (West Indies, from 21 April, until end of May); Herschelle Gibbs (South Africa, for Twenty20); Clint McKay (Australia, for Twenty20)
Outs: Michael Vaughan (RET), Simon Guy (REL), Deon Kruis (RET), Matthew Hoggard (Leicestershire), Chris Taylor (RET)