Boston Celtics All-Star point guard Kyrie Irving is expected to miss 3-6 weeks after undergoing surgery Saturday to remove a tension wire in his left knee, the team announced. That timetable might allow Irving to return as early as Boston's first-round playoff series, but it seemingly rules out a return during the regular season. In a release, the Celtics noted, "the wire was originally placed as part of the surgical repair of a fractured patella sustained during the 2015 NBA Finals. While removal of the wire should relieve irritation it was causing in Irving's patellar tendon, the fractured patella has fully healed and Irving's knee has been found to be completely structurally sound." Irving sought second opinions this week after soreness in his left knee failed to dissipate with extended rest. After being forced out of a loss to the Pacers earlier this month, Irving said he hoped to avoid surgery but the Celtics announced Friday that he would undergo a "minimally...