Titans sign new winger
The 24-year-old will spend a month at Clifton Lane, joining from Glasgow Warriors.
McCall can play outisde cantre and on the wing and Bester sees him as a potentially powerful acquisition. He will make his debut in Saturday's British and rish Cup match at Swansea.
Said Bester: "He is a strong player and will fill an important role for us. We'll take a look at him over the next month and he'll take a look at us. If is works out he'll be here for the rest of the season."