But defenders Rob Kozluk and Luke Potter, strikers Jon Macken and Michael Coulson and goalkeeper Luke Steele, who are also out of contract, have been offered new deals.Brazilian centre-half Souza has been a regular in manager Simon Davey's starting line-up since arriving from Belgian side Charleroi in time for the 2007/8 season, making a total of 78 appearances for the Tykes.Full-back Van Homoet signed on a free transfer from Sparta Rotterdam in June 2007, but has failed to hold down a regular place in the side, while Leon, a former Real Madrid youth-team player, has been a key member of the Tykes' midfield since arriving from Grasshoppers Zurich in January 2008.Letheren has been a regular for the Tykes reserves for the last two seasons, but has been unable to force his way past first-choice goalkeeper Heinz Muller and Steele.
Source: Team_Talk