Oregon's current offensive coordinator didn't coach Herbert.
Herbert was coached by Marcus Arroyo. Arroyo was hired by Willie Taggart and was co-OC with Mario under Taggart. When Taggart took the FSU job, Mario got promoted to head coach and he kept Arroyo as his OC. Arroyo got the HC position at UNLV and Mario hired Joe Moorehead as OC for the 2020-2021 seasons. Moorehead has had success as an OC and HC but he's been inconsistent. He was OC at Akron and then UCONN the year they went to the Fiesta Bowl. He then went 38-13 as head coach at Fordham. He parlayed that into an OC gig at Penn State. HIs offense at PSU averaged 37.6 and 41.4 points per game during his two seasons there. He took the Mississippi State HC job after Mullen got hired by Florida but got fired after the 2019 season. His offenses at Oregon have averaged 31.3 and 32.7 points per game respectively. Good but nothing spectacular. He runs a power spread that relies on a mobile quarterback similar to Dan Mullen and Urban Meyer's offensive systems. I don't think Mario is attached to him particularly so, he might or might not end up here should Mario be the guy. Personally, I'd prefer they keep Lashlee but they could do a lot worse.