Northamptonshire have announced that Andrew Hall and Matthew Spriegel will not be offered new contracts for the 2015 season.
Hall, a former club captain, has been at Wantage Road since 2007 while former Surrey man Spriegel joined the county in 2012.
Both players contributed as Northants Steelbacks won the Friends Life t20 last year but will now be released at the end of the campaign.
Chief executive David Smith said: "These are always difficult decisions to make regarding players futures, but they are always made in the best interests of moving the club forward over the next few years.
"The club wishes to place on record its sincere thanks to both players for their commitment throughout what has been a difficult summer for everyone connected with Northants Cricket."