Kentucky QB Terry Wilson's entered the portal. Frost recruited him to Oregon before he left for UCF. Wilson verbally committed to Oregon on December 1, 2015, the day Frost got the job at UCF.
After one season at Oregon, he transferred to Garden City, KS Community College and spent a season there before transferring to Kentucky before the 2018 season. I seem to recall some speculation/debate on this board after Frost got hired that Wilson might have been a JUCO target for Nebraska before he transferred to Kentucky.
If Frost wants a QB from the portal, Wilson's available.