Wardle, 24, joined Albion back in the summer of 2018 and has been a mainstay in the heart of the Witton defence ever since.
In addition, he was appointed team captain and skippered the side during 2020/21.
Veteran former Tranmere, Luton, York and Fleetwood defender McNulty, 37, arrived at Wincham Park to join up with his long-term friends Carl Macauley and Gary Martindale, the management team at Witton.
He featured as Albion made a strong start to the season before restrictions curtailed the campaign.
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