If you're a racing fan, you can't ask for much more than what is on tap Saturday: three important Kentucky Derby preps and the season debuts of Rachel Alexandra and Zenyatta . The 3-year-old races will give us a much clearer picture of the top Derby contenders and set things up well for the final preps...

There is a full weekend of stakes action on the calendar, including a trio of important 3-year-old prep races--the Sam Davis and Robert Lewis on Saturday, and the Southwest on Monday--but all of those races have been pushed to the background by the announcement that Rachel and Zenyatta will supposedly...