Anthony Ireland, Angus Robson, Tom Wells and James Sykes have signed extensions to keep them at Leicestershire.
The quartet were out of contract after this season. Sykes has penned a two-year deal while Ireland, Robson and Wells have committed for one year.
Zimbabwean seamer Ireland, who joined from Middlesex in March, was the Foxes’ leading wicket-taker in the Friends Life t20 with 15 scalps at an average of 15.73. He picked up two four-wicket hauls that led to wins over Durham Dynamos and Derbyshire Falcons.
The 29-year-old was also part of the Yorkshire Bank 40 side, but injuries restricted his appearances in first-class cricket.
Youngsters Sykes, Robson and Wells made their Leicestershire first-class debuts in 2013. Sykes and Wells were also involved in YB40 and FLt20 matches.
Slow left-armer Sykes, 21, picked up a four-wicket haul on his LV= County Championship bow at Essex and gained more experience after Jigar Naik was injured. Sykes will now spend the winter alongside Ned Eckersley at the Darren Lehmann Academy in Adelaide.
Batsman Robson, 21, scored 49 in his second first-class innings and had a good season for the second XI.
All-rounder Wells, 20, made three quickfire contributions in the YB40 without being dismissed, scoring 88 runs off just 43 balls in those innings. Wells then hit 82 against Hampshire in the championship on the final day of the season.