Saturation will give your colors a pop, doing saturation as an adjustment layer would also allow you to mask (or soften) areas which you didn't want the effect to happen (such as his jersey). In addition, a Hue adjustment layer can also allow you to change some of the colors (again, masking the areas you don't wish to change).
Contest Entries: 282
The democracy will cease to exist when you take away from those who are willing to work and give to those who would not. - Jefferson