附上原文
Coach: A coach must be either fully retired for three full seasons or, if
still an active coach, have coached as either a fulltime assistant or head
coach on the high school and/or college and/or professional level for a
minimum of 25 years and reached the minimum age of 60. That person will then
be considered for Enshrinement in the fourth season of retirement or 26th
year of active coaching after reaching the age of 60.
这边指的应该是退休满三个球季，或是尚在执教中各阶层经历超过25年且满60岁
所以这个门槛只是对现役教练要入选的限制，若退休后只要满三年即可获得资格