Wycombe Wanderers defender Danny Foster has agreed a new two-year deal, while centre-half Chris Westwood has rejected a 12-month contract.
Westwood, 34, will now leave Adams Park and is reported to be in talks with Blue Square Bet Premier side Wrexham.
Foster, 26, has made 38 league appearances in the Chairboys' League Two promotion-winning campaign.
He arrived from Brentford in the summer alongside former Dagenham & Redbridge team-mate Ben Strevens.
"I always wanted to stay here and never thought about leaving for a second because this is such a good club to be at," he told the club website.
"The manager, staff, players and fans have all been great to me so it ticks all the right boxes."
Manager Gary Waddock added: "Danny is an important member of the group and I'm delighted that he has agreed a new deal to stay at the club.
"He's an excellent character to have in the dressing room and is somebody we know we can rely on to produce a high level of performance anywhere across the back four.
"Chris has made an excellent contribution to the club in his two years here and he leaves with our best wishes for the future.
"His experience, character and ability played a big part in our achievements this season and I'm sure he will enjoy further success at his next club."