Mayo, originally selected by the Coyotes in the fifth round (133rd overall) of the 2014 Draft after winning the WHL title and Memorial Cup with the Edmonton Oil Kings, has agreed on terms to a new one-year, two-way deal with the organization.
The 23-year-old Victoria, British Columbia native has been a mainstay in the American Hockey League since 2016, racking up 221 regular-season appearances - scoring 12 goals and earning a further 26 assists.
The 6-foot-2, 194lbs right-handed shot has been a reliable player in the AHL but has not yet made his debut in the NHL.
Financial terms of the deal have not been officially announced by the organization, but the offer is more than likely a minor league deal.
Mayo, who was an impending RFA this summer after signing a one-year, $715,000 deal last summer, is currently behind the likes of Kyle Capobianco and Victor Soderstrom in the pecking order of defencemen and will likely continue to ply his trade in the AHL for the foreseeable future.
Having Mayo locked up for the 2020/21 season is a positive move for the organization, who keep a young, talented blueliner with their affiliates, with hopes of challenging for the Calder Cup when hockey starts once again.