Kapp, the world's No. 1 ODI allrounder, has moved from the Sydney Sixers. She brings plenty of experience to the Scorchers, having played in various leagues across the world, including the Kia Super League in England. She has picked up 90 wickets in the WBBL along with scoring 892 runs in the tournament, bolstering a Scorchers team that has not won a title yet. Kapp has also played 81 T20Is, with 986 runs at an average of 18.96 and has picked up 62 wickets at an economy rate of 5.39.
Athapaththu became the first Sri Lankan player to be signed by a WBBL franchise when she was brought in by the Melbourne Renegades in 2017. She has had several memorable international performances against Australia in the last few years, including an unbeaten 178 in Bristol in the World Cup in 2017 and a rapid hundred - 113 off 66 balls in a T20I - at North Sydney Oval in 2019.
Athapaththu's last match in the WBBL was in 2019 having not participated in the 2020 season.
"Marizanne is one of the premier all-rounders in world cricket and has a phenomenal WBBL record," the Scorchers' head coach Shelley Nitschke said. "With over a decade of international experience and a highly-regarded work ethic, Marizanne will have a strong impact both on and off field for the Scorchers. Chamari Athapaththu is an undeniable match-winner and has the ability to take the game away from the opposition quickly."
The Scorchers finished fourth in the WBBL standings last season with six wins and six losses before they were beaten in the semi-final by the Melbourne Stars in Sydney.