The 4 worst trades in OKC Thunder's history 

#1 James Harden traded to the Houston Rockets

James Harden was traded away as a promising 23-year-old

This trade will not only go down as the worst in Thunder history, but also as one of the worst in NBA history.

Harden had just won the sixth man of the year award, and the then 23-year-old had averaged nearly 17 points from the bench in the 11-12 NBA season. The Thunder team had also just reached the NBA finals, with a team containing Russell Westbrook, Kevin Durant and Serge Ibaka.

Harden, however, was soon traded away. The Thunder offered him $4.5 million less than he was eligible for, Harden rejected that, and Oklahoma opted to move forward without him.

Harden has since transformed into one of the best players in the NBA, and he is the current MVP. The trade itself included a lot of parts. The Rockets received James Harden, Daeguan Cook and Lazar Hayward, while the Thunder received Kevin Martin, Jeremy Lamb and three future picks.

None of these players had much effect on the franchise, and Thunder fans have been left to ponder how many Championships they could have won if Harden hadn't been traded away.