Johannesburg, Oct. 14 -- One franchise is betting on a teenage talent it has tracked for more than a year; another is bringing together two of the Caribbean's most destructive T20 batters. The contrasting strategies of Joburg Super Kings and MI Cape Town offer a glimpse into the thinking behind the signings shaping SA20 Season 5.

Joburg Super Kings' signing of 18-year-old Jason Rowles for 315k USD was the culmination of a long-term scouting process, rather than an auction-day gamble.

Head coach Albie Morkel revealed that the franchise first assessed Rowles at a young-talent camp last year, with his left-arm spin and top-order batting making him a prospect for the future. "We actually had a camp last year in South Africa where we invited...