It comes in the form of former Utah State Aggies graduate assistant coach Dillon Sanders, according to Football Scoop:
Source tells FootballScoop Dillon Sanders is joining the Kentucky staff as working with the outside linebackers. Sanders spent the past few seasons at Utah State in a similar capacity (grad assistant working with the outside linebackers) and had recently joined the staff at Colorado State in a similar capacity a few months before this opportunity at Kentucky presented itself.
It looks like Sanders is going to be the replacement for outgoing linebackers coach/special teams coordinator Andy Buh, who became the Maryland Terrapins defensive coordinator earlier in April.