I assume the link you went to for that short story in Redbook Magazine is actually the Internet Archive. They have lots of books and magazines in the digital archive, but some of them are restricted by copyright. It appears that Redbook is on the restricted list so you can't look much farther than the index.
If you want to read the story, it looks like you will have to get the new book ($) or a physical copy of that Redbook Magazine ($$$$).
Not to keep beating this horse, but the pool stories in this are as good as the Hustler, and the Hustler is one of my favorite books. I’m shocked these weren’t more widely circulated before.