Sunderland midfielder Lumsdon has made 12 appearances for Crewe during his loan spell at the club this season, his second loan spell away from The Stadium of Light, having joined Blackpool for a month at the end of last season.
Maybury also spent his second spell on loan away from his club, Leeds, at Crewe, playing six games for Gradi's men during his month at the First Division club. The 22-year-old returned to Elland Road last week after completing his loan spell, but Gradi is believed to be keen for him to return to Gresty Road.
