10. JaVale McGee
The Dallas Mavericks thought they had finally fixed their weakness at starting center last summer when they signed JaVale McGee to a lucrative three-year deal. McGee was coming off an impressive playoff run with the Phoenix Suns and had already played with the Mavs once before.
What could go wrong?
McGee was promised the starting job from Jason Kidd months before training camp, and he lost that job in less than a month. His year in Dallas was a disaster, to say the least.
McGee averaged 4.4 points, 2.5 rebounds, and 0.6 blocks per game. He was nearly unplayable, and this caused the Mavs to release him.
McGee's time in Dallas was a disaster due to him being a liability on defense, not being able to play normal minutes due to him getting winded easily, and not being a reliable option on offense.
McGee getting waived was inevitable as Dallas searched for a trade partner for multiple months before waiving him. This was one of Dallas' biggest free agency mistakes of the last few years, and they'll be paying for it for the next couple of years.
McGee signed a contract with the Sacramento Kings this offseason, and his first matchup with the Mavs is on November 19.