The 2025 Topps Chrome UFC Sean O'Malley Green Refractor Mark Of A Champion Auto #/99 is a highly sought-after sports trading card featuring an autograph from UFC fighter Sean O'Malley. This limited edition card is part of the Topps Chrome UFC set, known for its exclusive Chrome parallel variety. As a short print with a print run of only 99, it is a rare and valuable collectible for fans of mixed martial arts and the Ultimate Fighting Championship. The green refractor design adds a unique touch to this standout card, making it a must-have for any collector of sports memorabilia.