Hampshire have announced they have extended the contracts of Sean Terry, Tom Alsop and Lewis McManus until the end of the 2016 season.
The trio's deals were due to expire next year.
Hampshire director of cricket Giles White said: "All are talented young players and will be hoping to push for a place in the starting line-up.
"The important thing is for them to develop their games and we are looking forward to seeing them progress."
Terry (pictured), 23, is the son of former Hampshire and England player Paul Terry.
He made his senior debut for the club in 2012 and is currently playing for Melville in Perth during the off-season.
Wicketkeeper-batsmen Alsop, 19, and McManus, 20, are both products of Hampshire's academy.