Montero lost 40 pounds this offseason, the Seattle Times reports.Montero angered the Mariners last season when he showed up to spring training 40 pounds overweight. He's nearing the end of his rope with the organization. "He has a lot to prove," general manager Jack Zduriencik said. "And there aren't a lot of expectations there right now." Montero will play first base this year, likely starting the season at Triple-A. If Logan Morrison gets injured, Montero perhaps could be called up -- assuming he's at least competent at first base.