Lap number 100 of Sunday’s Indy 500 was dedicated to Bryan Clauson, the dirt track hero and three-time Indy 500 competitor who died in August at 27 years old during an accident on the track.

Tragically, Clauson was struck in the head by a piece of debris from another car at the Belleville Midget Nationals in Kansas.

As he was on life support last summer, his family learned that he signed up to be an organ donor. Although the decision to let Clauson go was extremely difficult, they knew in some sense, his life would be carried out by someone else.

Actually, that “someone else” turned out to be five other people including Dan Alexander, an Army veteran and father of five who received Clauson’s heart.

“It’s not every day that someone dies for you, and you continue to live because of the sacrifice he made,” Alexander said.

In April, Alexander had the chance to meet Clauson’s parents and sister for the first time as documented by SportsCenter Featured, and it’s well worth the watch.

May 18, 2016; Indianapolis, IN, USA; Verizon Indy Car driver Bryan Clauson sits in his car during practice for the Indianapolis 500 at Indianapolis Motor Speedway. Mandatory Credit: Brian Spurlock-USA TODAY Sports

Knowing the power of organ donation, Clauson’s family encouraged others to sign up to be donors as well. Initially, they were shooting to get 200 more donors on the national list, but their expectations were far exceeded. In the end, more than 4,000 people signed up, meaning the ripple effect could save the lives of more than 20,000 people.

If you’d like to sign up to become an organ donor, visit Organdonor.gov.