It's not really true, see below, just went through this with some folks at work yesterday. I do think Kurt is a good guy and his wife did have a child with disabilities when they met and he seems to have reacted in the "spirit" of the internet version of their story.
From
www.truthorfiction.com
The story of Kurt and Brenda Warner's meeting and marrying is an often-told and inspiring one, but this particular eRumor version of it includes a lot of fiction.
They did not meet as fellow employees at a supermarket and their son does not have Down Syndrome.
When they met, Kurt was a university student and Brenda was a divorced single mom living on food stamps. In his autobiography "Keep Your Head Up," Kurt describes his and Brenda's first encounter when a teammate at the University of Northern Iowa talked him into going to a country-music club in Cedar Falls, Iowa. There was an instant connection, but Brenda didn't know whether it would last. Not only was she a single mom, but one of her two children, her son Zachary, had significant medical problems. He was blinded and brain-injured when accidentally dropped to the floor by her first husband. Kurt was not turned aside by the children or Zachary's condition and he and Brenda forged a relationship that resulted in their marrying four years later. Kurt's celebrated job at a grocery store took place in 1994 after he got a pink-slip from the Green Bay Packers. He returned to Cedar Falls and worked nights stocking shelves for $5.50 an hour. He rose to fame by throwing an amazing 41 touchdowns for the Rams, bringing them to a 13-3 record and to memorable victory in Super Bowl XXXIV. He's become known for his commitment to his family, his clean-kid lifestyle, and his Christian faith. He and Brenda now live in St. Louis with their four children Zachary, Kade, Jesse, and Jada Jo. He is the founder of the First Things First foundation.