9. Amar'e Stoudemire
Amar'e Stoudemire had a phenomenal career in the NBA as he averaged 18.9 points, 7.8 rebounds, 0.8 steals, and 1.2 blocks per game, but his time in Dallas was forgettable (by most), and he was way past his prime.
The Dallas Mavericks signed Stoudemire in February 2015 after he was bought out by the New York Knicks. Dallas was in the thick of the playoff race and brought in Stoudemire to provide some depth off the bench.
Stoudemire was productive during his time in Dallas, as he averaged 10.8 points and 3.7 rebounds, but his numbers were way down, and he didn't rebound much at all.
Stoudemire's numbers had been regressing during his entire tenure playing for the Knicks, and his career ended shortly after leaving the Knicks. He averaged 25.3 points per game in his first season with New York, and those numbers fell all the way down to 12.0 points per game before reaching a buyout and joining Dallas.
Stoudemire ended up having a minor role in Dallas' playoff series against the Houston Rockets, but Dallas lost in five games, and he joined the Miami Heat that offseason.
Stoudemire played in 52 games for the Heat that season, and decided to play overseas after that.