LeBron James is concerned about the Cleveland Cavaliers' offseason, according to a source close to the situation.

James' optimism for the Cavaliers has waned since Dan Gilbert was unable to agree to a new deal with David Griffin. The Cavaliers remain without a general manager. James is frustrated and concerned about the Cavaliers' ability to put together a roster to compete with the Golden State Warriors.

James can become a free agent after the 17-18 season.

The Cavaliers were close to making a deal for Jimmy Butler when Gilbert decided to part ways with Griffin and Trent Redden, which further exacerbated James' frustrations.

James was active in recruiting Jamal Crawford to the Cavaliers but they instead used part of their taxpayer midlevel exception on Cedi Osman.

At the age of 32, James wants to continue to win now.