Usman Shinwari played for Melbourne Renegades in the previous season as well.
He has previously represented the Renegades five years ago.
Molineux has played one Test, three ODIs and 17 T20Is in her career.
Ellyse Perry continues to be a crucial player to be made as captain or vice-captain.
Sophie Molineux will be a perfect option for a multiplier role due to her all-round ability.
Meg Lanning averages 50.03 with the bat in the WBBL.
Sophie Devine scored an unbeaten 72 on Saturday against the Renegades.
If Sophie Molineux opens the batting like in the previous season, she would be the ideal choice as captain or vice-captain.
McDonald led Victoria to title win in 2016-17 season.
"It was a very successful period for the club"- Marsh.
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