In this continuing series, we examine the past winners of significant filly/mare races by the lasting influence they've had on the breed. Up today is Del Mar's GI Del Mar Oaks, inaugurated in 1957 on the dirt but a permanent fixture on the grass since the 1965 edition. As always, when there's racemares of this caliber, many will go on to become excellent producers. A few especially leap off the page for their accomplishments after racing. Following are highlights of some of the most important Del Mar Oaks winners by...