LeBron James understands why there's already speculation that he could opt out of his contract with the Miami Heat after two more seasons, but the NBA's reigning MVP doesn't want any part of the discussion. Responding to an ESPN.com report on Thursday that teams such as the Los Angeles Lakers already are plotting for the next time he potentially can become a free agent, James said his only focus is on helping the Heat defend their title. "I'm here, and this is what it's all about," James said after the Heat's 105-78 preseason win over the Detroit Pistons on Thursday. "I'm preparing for this season, preparing to defend our title and that's it. This is where ... I'm here now." James, along with teammates Dwyane Wade and Chris Bosh, each signed contracts as free agents in 2010 that allows them to opt out of those deals after the 2013-14 season or remain with the Heat for two additional seasons. Read more: http://espn.go.com/nba/truehoop/mia...dismisses-los-angeles-lakers-free-agency-talk