The Alex kicked off their Sky Bet League One campaign with a 3-3 draw against Rotherham when they conceded two late goals before they were knocked out of the Capital One Cup by Bury in midweek.
Winger Molyneux, who signed as a free agent this summer following his release from Accrington, is still waiting to make his Crewe debut after picking up a red card with his former club.
Striker Mathias Pogba (knee) is still four months away from a return but Vadaine Oliver hopes to play more of a part after a couple of substitute appearances following his groin strain.
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- Mathias Pogba