The bout will remain intact, however, and officials announced that they plan to move it to a later, yet-to-be determined date.
With the Jacare-Romero fight now off the card, a recently announced lightweight match-up between Tony Ferguson and Yancy Medeiros will move up to main-card status.
UFC 184 is scheduled to take place in Los Angeles at Staples Center on Feb. 28. A middleweight title fight between division champion Chris Weidman and No. 1 contender Vitor Belfort will serve as the main event.