Browns tight end Kellen Winslow will undergo offseason knee surgery, according to ESPN.com. "I'm definitely going to have a surgery done on my knee," Winslow said according to The Cleveland Plain Dealer. "My shoulder might be strong enough ... I'm just really worried about my knee. Your legs are your life. I need my knee." Winslow has had multiple surgeries on his knee since he injured it in a motorcycle accident in 2005.