Sherdog.com confirmed the pairing following an initial report from Brazilian media outlet Combate. UFC Fight Night 137 takes place at Ibirapuera Gymnasium and is headlined by a light heavyweight showdown between Glover Teixeira and Jimi Manuwa.
Barao has fallen on hard times of late, losing four of his last five promotional appearances. Most recently, the 31-year-old Brazilian dropped a unanimous verdict against Brian Kelleher at UFC on Fox 28. Barao began his UFC tenure with seven consecutive wins, a run that was part of a 33-fight unbeaten streak overall.
Ewell, the CES bantamweight champion, enters his debut on a four-bout winning streak. The 30-year-old Riverside, Calif., native claimed the New England-based promotion’s vacant 135-pound strap with a third-round submission of Dinis Paiva at CES MMA 50 on June 15.
Anthony Walker contributed to this report.