The Lakers honored surfer Kelly Slater's 10th World Title by having him be the guest of honor at a game in 2011. A native of Florida, Slater has been surfing for over 20 years and is the youngest and oldest ASP (Association of Surfing Professionals) champ. Slater's jersey #10 is for his 10 titles (although he now has eleven). Perhaps some team will honor him again and he will get another Celebrity Jersey Card.
Sergio Ramos is a soccer star, playing for Real Madrid and Spain. He has won numerous championships, awards, titles and now he is appearing on a Celebrity Jersey Card, which clearly will be his career highlight. He is sporting Rajon Rondo's #9, although I do not know of any specific connection, other than both are stars.