Nation of Cards was built by collectors who genuinely love the hobby. What unites our team is a lifelong passion for opening packs, chasing meaningful cards, and sharing that excitement with people who truly get it. We believe in fairness, transparency, and thoughtful curation—because everything we offer is something we’d want in our own collections.

At its core, Nation of Cards is about people. It’s about the stories behind the cards, the thrill of a great pull, and creating a welcoming space where collectors—new and experienced—feel like part of something bigger.

Brian Mark

Partner · TCG, Marvel & Sports Cards

Brian Mark, co-founder of Nation of Cards, grew up in Colorado Springs—right where the shop is now—and graduated from Doherty High School as an accomplished football player. Falling in love with collecting as a kid ripping packs, he now leads the TCG, Marvel, and assists in major sports card operations—hockey, football, and beyond. With fairness and transparency at the core, he ensures every collector, whether chasing sports legends or Marvel heroes, feels like part of the Nation. Known for his eye for value and love of a good chase, Brian is all about creating a space where collecting is as thrilling as it is trustworthy.

Mike Jiron

Partner · Sports Cards & Acquisitions

Mike Jiron is a partner at Nation of Cards whose love for collecting started early, thanks to trips to the local card shop with his mom hunting for Denver Broncos cards—and, for reasons still debated, her fondness for Emmitt Smith. A true student of the game, Mike watches sports nonstop and has a natural knack for identifying talent, which made turning his lifelong passion into a business feel like the perfect fit. At Nation of Cards, he focuses on acquiring sports cards across football, baseball, basketball, hockey, MMA, and NIL inventory, while also dabbling in the Marvel side of the hobby. Fiercely committed to growing the next generation of collectors, Mike believes in pairing smart, disciplined buying with a level of hospitality this city deserves. Known for his multi-sport singles shows and baseball prospecting, he brings 23 years of food and beverage leadership experience and a steady, long-term mindset rooted in blue-chip players, consistency, and letting history—not hype—define value.

Aaron Radman

Partner · Guest Experience, Combat Sports, & NIL

Aaron Radman is a partner at Nation of Cards who found his way into the hobby back in high school, took a brief pause for real life, and jumped back in headfirst thanks to Mike and Brian. He was drawn to turning collecting into a business because of a shared, customer-first mindset—where caring about people matters just as much as the cards. At Nation of Cards, Aaron focuses on combat sports cards, guest services, and keeping the shop’s social media engaging and entertaining. Fiercely protective of the shop’s integrity, Aaron believes relationships are just as important as the cards themselves. Known for elite-level dad jokes and just enough spice to keep things fun, he’s a lifelong sports fanatic, former college wrestler, and wrestling coach whose biggest passion is being the best husband and dad he can be.