During the middle of his second season on the NASCAR circuit, Martin Truex Jr. and girlfriend Sherry Pollex started a foundationto help children overcome various obstacles in life, from depression to anxiety. Over the years, that mission subtly transformed into what it is today, as the Martin Truex Jr. Foundation now takes aim at childhood and ovarian cancers.

“When first started, we just wanted to help people and use our platform in whatever we could to do that,” Truex said after his…