I like #2 better, and depending on their planned use, it's much more flexible.
#1 is cool and creative, but it has some composition issues - helmet in crotch, shows bottom of shoes, not an athletic looking pose, very busy, and worst of all, you can't read the team name.
#2 is a simple pose, shows the athlete, the sport, and the team in one pleasing and tight composition - and you did a great job on the lighting, so what's not to like? This would be a perfect shot for a player profile on a website or team publication.
Good job on both, just pointing out that the client made a very reasonable choice from my perspective.