Broncos center Tom Nalen undergoes knee surgery

Denver center Tom Nalen had arthroscopic surgery on his left knee Friday and the Broncos expect him to be ready for training camp in July. The 14-year veteran has played in 194 games, including 188 starts. Only two Broncos have played in more: kicker Jason Elam, now with the Falcons, who played in 236 games, and retired quarterback John Elway, who played in 234. The Broncos have a veteran backup in Casey Wiegmann, a 13-year pro signed in the offseason. (link)