The hamstring tear that has sidelined Brian Urlacher could end the future Hall of Famer's career, ESPN's Adam Schefter reported Sunday. The Chicago Bears middle linebacker has a Grade 2 hamstring tear that typically keeps players out 3-6 weeks and it's a possibility that Urlacher is not ready to return before Bears season is over -- whether that's in the regular season or playoffs. Sources told Schefter "it's not out of the realm of possibility" Urlacher could retire after the season. He'll be a free agent in the spring and has had no "substantial" talks with the organization. That could mean Urlacher has played his final game. Source: NFL.com