Jones had said at last week's UFC 145 press conference that he didn't expect Jackson to corner him.
Evans trained at Jackson's MMA long before Jones and originally the two had vowed never to fight. That all fell apart when Evans had to bow out of a UFC 128 title shot against Mauricio "Shogun" Rua and Jones stepped up and took the title.
Evans and Jones quickly ceased being friends and Evans left Jackson's MMA as part of the fall out.
Jackson originally had said he would never corner one of the two against the other, but recently rethought his position. Essentially Jackson concluded that since Evans left the team that he owed it to the team to corner Jones.
ESPN Magazine recently did an in-depth feature on the Jones-Evans rivalry and how Dana White and other UFC officials egged it on.
Here's Jones' tweet: