Long, 22 was set to become a free agent this summer but has agreed a contract extension with the club where he made his Football League debut aged 17.
The shot stopped, who has England U-20 caps will remain at Bramall Lane until 2018.
Long, 22 was set to become a free agent this summer but has agreed a contract extension with the club where he made his Football League debut aged 17.
The shot stopped, who has England U-20 caps will remain at Bramall Lane until 2018.