Jack is 77 and is so deserving of retiring on his terms.
That said, PSU Football Inc needs to hire a new radio color commentator with the following attributes:
1) a good voice; someone easy on the ears
2) someone who doesn’t talk too much (e.g. John Smoltz and Ron Darling bloviate during MLB broadcasts) but interjects with insightful commentary in small doses.
3) someone who is knowledgeable about football, preferably PSU football
4) someone who can be periodically and objectively critical of PSU Football when necessary (e.g. George Paterno, Jack Ham)
Jack will be a hard person to follow.