Jack Klein was a 10 year old who loved life, laughing and monkeys. His community rallied around him during his illness under the moniker "Jack's Pack". Their slogan was "We have Jack's Back". After Jack succumbed to Burkitt's Lymphoma, his pack has pivoted to funding a cure.
2025
$84,220
Funds Raised in 2025
2024
$91,780
Funds Raised in 2024
$1,429,356
Total Funds Raised
Since 2016

The Story Behind This Hero Fund

Jack was born on October 5, 2005 in Indianapolis, Indiana.

He spent his toddler years in playful exploration of the world around him, guided by his older sister Ali and big brother Matthew. As he grew up he developed an infectious and fun-loving personality. Sharp-witted, he could crack a well-timed joke that made everyone laugh. He was a committed reader, passionate video gamer, comic book aficionado, and an aspiring chef. Jack knew how to play, and when he played he played hard—he wrestled, laughed, rode bikes, played computer games, threw himself into sports, and caused all manner of delightful mischief with siblings, friends, and cousins. On any given afternoon when Jack had been out playing with friends and family, the yard was filled with evidence of childhood happiness—draped over the bushes, stuck on the garage roof, and scattered in the grass. Jack was a happy kid, and nobody who met him will ever forget his smile. In fact, it’s hard to remember a time when he was not smiling, and that pure and perfect smile made everyone around him smile. Jack loved to learn and was always curious about the world around him. He excelled in school and was well-loved by classmates and teachers.

After reaching remission after a three month battle with Burkitt’s Lymphoma in July, 2015, Jack’s disease relapsed a month later. His family, seeking the best possible care, took him to New York’s Maria Ferari Children’s Hospital. While he initially responded well to the second round of treatment, the disease eventually progressed to the point that further treatment was not likely to be successful. Jack and his family returned to Indiana where he succumbed February 6th, 2016.

Jack passed away because of cancer, but he did not lose to cancer. On the contrary, Jack’s bravery in the face of this disease has inspired countless people around the world to live their lives more joyfully and purposefully and to pass on random acts of kindness to strangers as a way of honoring Jack and spreading his love. Love for this special boy gave rise to “Jack’s Pack,” a community of friends and family near and far—and Jack’s Pack will always have Jack’s back. This fund is the manifestation of that love, with money being raised to further research on Jack’s specific disease in the hope that others can benefit. Jack would have wanted it that way and he would be proud to know his pack still has his back.

Highlights & Happenings

  • Broad Ripple Haverford Little League Event

    Join this St. Baldrick's event.  Whether you decide to shave your head, volunteer, or donate, we hope you'll be a part of the excitement!
  • Our 2014 Donors

    Filling the Funding Gap

    Learn about the funding gap that impacts childhood cancer research and how St. Baldrick’s is trying to fill it.
  • Your Support Means So Much

    These friends and family members helped us raise funds for childhood cancer research in honor of Jack! See the 2016-2023 list.

Photo Gallery

Funding in Action

Donations given to Jack's Pack - We Still Have His Back have funded St. Baldrick's Research Grants for Roarke Kamber Ph.D., Carl Allan M.D., Ph.D., Mitchel Cairo M.D., Christine Eischen, Ph. D., and Raman Bahal, Ph. D., a St. Baldrick's Scholar grant for Lisa Roth, M.D., as well as a portion of the St. Baldrick's EPICC Team multi-institutional consortium grant.

The St. Baldrick's Foundation is guided by a Scientific Advisory Committee, comprised of leading experts in the childhood cancer community, to ensure that every dollar makes the greatest impact for kids with cancer.

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Who's Involved

These people make us smile - they’re the doers and money-raisers on behalf of Jack's Pack - We Still Have His Back. They’re shaving their heads, hosting events, starting fundraisers and more to make childhood cancer research possible.

2025 Events

Thank You to Our 2025 Donors

$1–$99

  • Mary Sumners

Get Involved Your Own Way

  • Create An Event

    Start your own St. Baldrick’s head-shaving event to support our Hero Fund! A dedicated staff member will guide you every step of the way—and you’ll have fun doing something great for kids with cancer.

  • Be a Shavee

    Register to shave your head and support our Hero Fund at any St. Baldrick’s event worldwide! No event nearby? Go virtual and shave anytime, anywhere.

  • Start a Fundraiser

    Not into head-shaving? No problem! Start a fundraiser for our Hero Fund doing something you love—bike a marathon, host a bake sale, anything goes!

This event is private

Private events are for people at the company, organization, school, etc., where the event is taking place. Please don't crash the party.

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Private events are for people at the company, organization, school, etc., where the event is taking place.