Ortega (11-0) has yet to taste defeat in his MMA career and is a perfect 3-0 since signing with the UFC. Back in June at UFC 199, he knocked out Clay Guida to add to wins over Diego Brandao and Thiago Tavares.
Dias (23-4-1) was bested in April by Cub Swanson, snapping his two-fight win streak. The Brazilian is 3-3 over his UFC run, with all six bouts going the distance.
UFC Fight Night 96 takes place October 1 and includes Will Brooks-Alex Oliveira and Josh Burkman-Bobby Green.