Rebels lose Crawford to injury
The 27-year-old has scored two tries, including the Rebels opening try on Friday, since returning from a hamstring injury that sidelined him for the first four rounds of the season.
Mike Harris and Tom English made successful returns to Super Rugby against the Brumbies.
Harris started at fullback in his first game since he suffered a quad injury in the Rebels opening round game against the Force in Perth while English saw the last five minutes off the bench in his first appearance since a knee injury in Round Five.
On the long-term injury list, tighthead Laurie Weeks still hasn't rocovered from a hamstring injury that sidelined him for six to eight weeks, while flyhalf Dan Hawkins is nursing a season-ending back injury.
Wing Dom Shipperley will also miss the remainder of the 2016 season with a knee injury.