Piers O’Conor also returns from a neck injury to start when Bristol welcome table-topping Chiefs to Ashton Gate on Tuesday (7.45pm KO).
Director of Rugby Lam makes nine changes from the side that secured a seventh successive Premiership victory over Gloucester in round fifteen.
Charles Piutau and Luke Morahan are recalled to the backline, while Harry Randall is also included.
In the pack, Max Lahiff and Bryan Byrne are named in the front row, while Ed Holmes and Dave Attwood form the second row partnership. Dan Thomas is selected at openside.