SECAUCUS, N.J. -- New York Red Bulls forward Oscar Echeverry will undergo season-ending surgery on his right knee. Echeverry had been playing banged up and a scan of his right knee last week revealed a bone lesion. The Colombian is scheduled to have the surgery Aug. 7 at the Hospital for Special Surgery in New York, the team said Tuesday. He will be out for six months. The Red Bulls placed him on the league's season-ending injury list. Echeverry signed with the team on March 26. He started seven of nine games. Echeverry, who previously played for Colombian First Division side Atletico Nacional, scored a goal in the Red Bulls' 1-0 exhibition win over Chivas de Guadalajara on June 25 in Glendale, Ariz. In another move, the team signed Mexican defender Diego Jimenez to a developmental contract. The 22-year-old spent the previous three seasons with Tecos. "Diego will provide depth and experience to our defense and we're confident that he will compete for a starting position," Red Bulls sporting director Jeff Agoos said.