retires. good guy, great player. hall of famer. too bad joe horn tagged his wife and ran him out of town. http://www.kansascity.com/mld/kansascity/15145272.htm RIVER FALLS, Wis. | Tackle Willie Roaf, the foundation of one of the NFL’s best offensive lines, has retired. Roaf wasn’t with the Chiefs when they reported for training camp on Thursday. Roaf told The Kansas City Star this morning by telephone that he had told president/general Carl Peterson and coach Herm Edwards of his plans weeks ago and even sent the Chiefs a letter declaring his intentions. “I guess they want me to reconsider,’’ Roaf told The Star. “I’m solid on retiring and going back to school.’’ Roaf, 36, was emphatic in the spring that he would play this season. But today he said lingering hamstring and knee trouble led to his decision.