Date of birth
Republic of Ireland
John-Joe O'Toole joined the Stags in October 2021 as a free agent.
O'Toole, who can play in both defence and midfield, has made over 400 career league appearances for Watford, Sheffield United, Colchester United, Bristol Rovers, Southend United, Northampton Town and Burton Albion.
The 33-year-old earned promotion from League Two with Northampton in 2016, where he was named in the PFA Team of the Year for a second season.