Negotiations between Josh Hamilton and the Texas Rangers on a multiyear contract extension have opened, and the All-Star center fielder has turned down the club's initial offer. Hamilton said Wednesday that he received a proposal Tuesday night, but he and agent Mike Moye were not impressed. Hamilton did not disclose terms of the offer - nor did general manager Jon Daniels or owner Tom Hicks - but discussions will continue. "My agent and I were disappointed with their offer," said Hamilton, who will make $555,000 this season. "The negotiations have begun." Hicks said the Rangers probably will use past deals with second baseman Ian Kinsler and designated hitter Hank Blalock as a guideline in talks with Hamilton. The goal is to buy out Hamilton's final three years of arbitration as well as his first few seasons of free agency