Alex Gidman will end his long association with Gloucestershire at the end of the season to join Worcestershire.
Surrey kept alive their faint hopes of promotion after earning maximum batting points against leaders Worcestershire.
Leaders Worcestershire endured a testing opening day as they were dismissed for 272 against Surrey at New Road.
Matt Coles and Sean Ervine each took three cheap wickets as Hampshire crushed Leicestershire by an innings and 34 runs.
Gloucestershire bowler James Fuller is out for the rest of the season as he needs surgery to correct a foot problem.
Kent claimed the last place in the semi-finals of the Royal London One-Day Cup with a 24-run win over Gloucestershire.
Gloucestershire have confirmed captain Michael Klinger fractured his left forearm while batting against Derbyshire.
Derbyshire's home victory over Gloucestershire saw them qualify for the quarter-finals of the Royal London One-Day Cup.
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A brilliant innings by Richard Oliver failed to prevent Worcestershire's first Championship defeat of the season.
England spinner Monty Panesar took 5-50 as Essex put themselves in a winning position against Glamorgan.
Worcestershire endured one of their worst days of the summer as they were dismissed for 194 by Gloucestershire.
Nottinghamshire will sign Gloucestershire all-rounder Will Gidman on a three-year deal at the end of the season.
Ben Stokes cracked 103 to lead Durham to a crushing six-wicket victory over Notts in Group B of the Royal London Cup.
Yorkshire Vikings took control of Group A in the Royal London Cup with a three-wicket victory over Leicestershire Foxes.
Gloucestershire opener Michael Klinger has signed for the Perth Scorchers for the 2014-15 Big Bash League season.
Derbyshire lost their perfect record in the Royal London One-Day Cup when rain ruined their clash with Worcestershire.
Gloucestershire and Worcestershire are off the mark in Group A of the Royal London One-Day Cup after contrasting wins.
Wayne Madsen struck his second successive Royal London One-Day Cup ton in Derbyshire's Group A win over Leicestershire.
Glamorgan secured the last quarter-final spot in the South Group, while Sussex's Luke Wright made a record 153 not out.
Full-on Yorkshire are the pride of the County Championship, says David Lloyd, and deservedly so.