Russell Penn has rejected a new contract with Burton Albion after agreeing a deal with League Two rivals Cheltenham.
The midfielder played a key role for the Brewers this season, making 42 appearances for Paul Peschisolido's side.
But the former Kidderminster man has opted to leave the Pirelli Stadium, much to Peschisolido's disappointment.
The Burton boss told BBC Radio Derby: "He's been a good servant to the club and has had good two years with us.
"But I spoke to him and he's decided to opt for a new challenge at Cheltenham."
Peschisolido added: "He's been a valued member of the team. He's played in numerous positions and has a great attitude, but the most disappointing thing is that he's left for a team in the same division."