Boston Celtics face trade challenges with Jaylen Brown

The Boston Celtics are attempting to trade star forward Jaylen Brown, but face hurdles due to Brown's contract and the team's high asking price. Reportedly, the Celtics seek four or five first-round draft picks and players to remain competitive. Brown, who is unhappy about being involved in trade discussions after a strong season, has three years left on his supermax contract. Negotiations appear complicated by differing valuations of Brown's worth and the assets available for a trade.

• 6:37 PMYahoo Sports — Shams: Contract length, size, picks ask barriers to Boston Celtics Jaylen Brown trade