Brazell captained the South Australian side at the Under 17 National Championships, where he finished third for most runs with 324 at an average of 54.
A century against the CA XI was a highlight for Brazell, the handy allrounder also collecting nine wickets in eight matches, including best figures of 4/26.
Rahaley represented the CA XI during the tournament, finishing with 249 runs at an average of 35.57 and a top-score of 87.
SA finished third in their pool with three wins and three losses in the minor rounds.
With all teams competing in finals, SA lost to Tasmania in the semi, but went on to beat Northern Territory in the final.
Queensland and ACT/New South Wales Country played off for first place, however the match was rained out and declared a draw, forcing the two teams to share the title.
Brazell and Rahaley will compete in the Under 19 National Championships from 3 December in Adelaide.