There are several NFL player that have become Jehovah's Witnesses, like Dave Pear from Colts and Travis Scott from Rams.
In 2015, free agent pass rusher Jason Worilds retired from football to pursue other interests. As per reports, Worilds did it to devote his time to working for his religion, the Jehovah’s Witnesses.
Find out more famous people who come from a Jehovah's Witness background, or are converts who became Jehovah's Witnesses at Adherents.com.
Sometimes NFL players retire "early" not because of sustained injuries, but instead due to fear and/or awareness of potential bodily harm in such a physical demanding sport.
Here's a list of notable players who entered retirement sooner (some much sooner) than expected... on their own terms, not those of their bodies shared by Sportingnews.com.