The Diamondbacks optioned Frias to Triple-A Reno on Thursday.
He was one of five players sent out from big-league camp in the Diamondbacks' latest round of roster cuts in advance of Opening Day. The 23-year-old right-hander had been vying for a spot in Arizona's bullpen to begin 2022 after he made three appearances for the big club last season following a Sept. 18 call-up from Reno.