Linley returns for leaders Surrey
Tim Linley returns to the Surrey squad for their Clydesdale Bank 40 clash against third-placed Durham at the Emirates Durham ICG.
The seamer will replace Australian Dirk Nannes, one of a number of players that signed exclusively for the Friends Life t20, as the Group B leaders look to maintain their 100% record.
Captain Rory Hamilton-Brown will be without Chris Tremlett, as the paceman is expected to be named in England’s squad for the first npower Test against India.
Michael Carberry keeps his place in the Hampshire side as Dominic Cork’s side travel to face fellow strugglers Leicestershire at Grace Road.
Carberry, who had been occupying the sidelines with a blood clot on his lung, made his return in the LV= County Championship defeat to Sussex and is set to play his first limited-overs game of the season.
Hampshire are without the injured Johann Myburgh, who has a hamstring injury, while batsman Neil McKenzie and 20-year-old spinner Danny Briggs are both rested.
Experienced performers Sean Ervine and Dimitri Mascarenhas return to the squad and wicketkeeper Michael Bates will continue to deputise for the injured Nic Pothas as Hampshire go in search of only their second win of the competition.
Second-bottom Leicestershire have also only secured one win this campaign and are likely to be without captain Matthew Hoggard, with the former England bowler nursing a wrist injury.
Scotland are set to field new signings George Worker and Kyle Coetzer when they host Northamptonshire at the Grange.
Worker, a 21-year-old batting all-rounder from New Zealand is the Saltires’ new overseas player. He replaces Luke Butterworth, who has been called up by Australia A.
Scotland international batsman Coetzer has joined on loan from Durham, whom he represented earlier this season in the CB40.
Worker replaces Ryan Flannigan from the squad for the tri-series with Sri Lanka and Ireland, which Coetzer featured in.
In Group A, Yorkshire could be missing Adil Rashid for their clash with Middlesex at Headingley Carnegie.
The leg-spinner missed the White Rose’s final 20-over match against Derbyshire after splitting the webbing in his hand in the championship win over Worcestershire at Scarborough, with David Wainwright waiting in the wings.
Tim Bresnan is likely to be named in the England squad which allows a possible return to the side for Ryan Sidebottom.
However, Iain Wardlaw and Ben Sanderson are in contention to start after impressing in recent weeks.
Wardlaw could make his CB40 debut after signing a contract until the end of the 2012 season, while Sanderson staked his claim for a place by taking 4-21 in the eight-wicket Friends Life t20 win over Derbyshire.
Middlesex are to assess the fitness of Toby Roland-Jones before naming their starting line-up.
The seamer has been struggling with sore shins and faces a late fitness test while England bowler Steven Finn is available for selection.
A win for Middlesex would see them move to the top of the group but they will have to make do without Gareth Berg, who is not scheduled for a return to first-team action until mid-August following a hand operation.
Elsewhere in Group A, second-bottom Kent, fresh from quarter-final qualification in the Friends Life t20, travel overseas to face mid-table Netherlands in Rotterdam.
In Group C, Glamorgan are without Graham Wagg for the visit of Unicorns at the SWALEC Stadium.
The Unicorns, searching for their first win of the campaign, have added Luke Beaven, Attiq Chishti and Craig Park to their squad after the trio impressed during warm-up matches against England Under-19’s at Loughborough.
Essex, reeling from their exit from the Friends Life t20, can go top if they beat Nottinghamshire at Trent Bridge.