18. Jessica Alba
Wifey Of: Derek Jeter, New York Yankees (MLB)
Alba rarely fades into the background of anything, but in the WAG world she is but one of Derek Jeter's conquests. The couple dated for an undetermined amount of time in 2004 after Jeter admired Alba from afar and made his move on a road trip to L.A.
In 2007, rumors began to spread that Alba was still feeling the effects of her hook-ups with the Yankees' star; it was alleged (though never proven) that Jeter had given Alba a mean dose of herpes. Fortunately, this story seems far-fetched for a lot of reasons, and both camps have denied all such reports.