Although White declined to relate the reason for the very sudden change, Kevin Iole is reporting via Twitter that it is due to the foot injury Jones suffered in his last fight.

"So @JonnyBones' foot still isn't 100 percent," tweeted Iole. "Hopes to start training early Jan. and fight in early spring. Feb. was too soon."
http://www.mixedmartialarts.com/news...-announcement/