MMAFighting.com was first to report the bout, which has not been officially signed. UFC Fight Night 139 takes place at the Pepsi Center in Denver on Nov. 10 and is headlined by a featherweight showdown between Frankie Edgar and Chan Sung Jung.
Ramos enters the bout on a four-fight winning streak, including a trio of victories inside the Octagon. In his most recent outing, the 23-year-old Brazilian took a split verdict against Kyung Ho Kang at UFC 227. Ramos owns a 12-1 professional mark, with nine triumphs coming inside the distance.
Simon, a former Legacy Fighting Alliance champion, is riding the wave of a seven-fight winning streak. That run includes victories against Montel Jackson and Merab Dvalishvili in UFC competition. The 26-year-old is 14-1 as a pro and has finished seven of his wins by knockout, technical knockout or submission.