John Cook is hanging ... In 25 seasons at Nebraska, Cook built the Cornhuskers program to be a powerhouse in women's volleyball, as highlighted by their four national championships, 12 NCAA semifinal ...

An emotional John Cook took the mic Thursday morning ... You can watch the full press conference below.

He went 722-103 at NU, guiding he Huskers to 12 NCAA Semifinals appearances, nine Big 12 titles and five Big Ten titles. "John ... conference awards and 155 academic all-conference honors in Cook ...