New York Yankees left-hander James Paxton has had back surgery and is expected to be sidelined until May or June. The team says Dr. Andrew Dossett performed a microscopic lumbar discectomy, in which a herniated disk is repaired, and removed a peridiscal cyst. The Yankees estimated Paxton's timeline to pitch in a major league game is three to four months. Paxton left his final regular-season start, at Texas in Sept. 27, after one inning with what the Yankees said was a tight left glute muscle. That ended Paxton's career-best streak of victories in 10 consecutive starts.