Keeper Adam Wheater and all-rounder Liam Dawson have signed contract extensions to keep them at Hampshire until 2017.
Daryl Mitchell passed 1,000 championship runs for the season as Worcs reached 317-9 on day one against Leics.
Acting captain Alfonso Thomas claimed two wickets in the final over as Somerset beat Gloucestershire by seven runs.
Sam Northeast's first century of the season helped Kent cruise to a six-wicket win against Leicestershire at Grace Road.
Hampshire seamer James Tomlinson enjoyed a moment to remember against Gloucestershire in Division Two.
Mitchell Claydon claimed his best figures for Kent as Leicestershire were bowled out for 217 on day one at Grace Road.
Hampshire missed the chance to take over top spot in the South Group as they suffered a 39-run defeat against Somerset.
Essex stayed top of the South Group with a five-wicket victory against Surrey, while Hampshire and Gloucs also won.
England batsman Michael Carberry has signed a three-year extension to his contract at Hampshire.
Division Two promotion rivals Surrey and Hampshire played out an inevitable draw on the final day at the Kia Oval.
Two late wickets for Gareth Batty gave Surrey a glimmer of hope of beating Second Division promotion rivals Hampshire.
Tom Fell hit 133 as Worcestershire recovered against Glamorgan, while Jason Roy starred for Surrey against Hampshire.
Rory Burns and Vikram Solanki guided Surrey to 68-1 on a rain-shortened opening day against Hampshire at The Oval.
Mark Pettini's perfectly paced half-century helped Essex back to top spot and handed Somerset a fifth defeat in eight.
Hampshire moved top of the South Division in the NatWest t20 Blast with a six-run victory over Glamorgan in Cardiff.
Kevin Pietersen's Surrey beat Glamorgan but he once again struggled to make an impact in Friday's encounter.
James Vince cracked 240 as Hampshire thrashed Essex by 470 runs inside three days to boost their promotion hopes.
Surrey and Hampshire took complete control of their respective Division Two fixtures on Monday.
Hampshire finished the first day in the ascendancy after making 286 all out and then reducing Essex to 55-2 at stumps.
Promotion chasing Hampshire and Worcestershire sit joint top after they were forced to settle for a draw at New Road.
We look at the star performers after the early rounds of the NatWest Twenty20 Blast
Saeed Ajmal put promotion rivals Hampshire in a spin to boost Worcestershire’s chances of forcing a victory at New Road.
Surrey finished the opening day with a first-innings lead at Bristol, while Worcestershire are on top against Hampshire.
Former England all-rounder Dimitri Mascarenhas has been appointed head coach of New Zealand's Otago province.
Ravi Bopara and Tom Westley both hit hundreds as Essex responded superbly on day two against Kent.