Serengeti Empress returns to the site of her greatest career victory on Saturday when she leaves the starting gate in the 2020 Derby City Distaff Stakes at Churchill Downs in Louisville, Ky. Last year's Kentucky Oaks winner is the 9-5 favorite. Post time is 5:17 p.m. ET.

Before you make any 2020 Derby City Distaff Stakes picks, you NEED to see what Saratoga expert Bob Weir has to say.

Based in Saratoga Springs, N.Y., Weir has been handicapping and following horse racing since reading Andy Beyer's landmark handicapping book "Picking Winners" in the late 1980s. Weir is highly invested in the Beyer Speed Figure, a number assigned to every race run by a horse that measures how fast the horse ran. He uses the figure as the backbone of his handicapping. In fact, thanks to his proficiency with speed figures and top-tier handicapping, he landed one of just eight spots on Beyer's figure-making team in 2017, a position he holds to this day.

Weir's methodology has produced multiple five-figure days. In 2014, he hit a $60,000 Pick 6 at Del Mar. The following year, he nailed a $31,000 Pick 6 at Gulfstream Park. In 2016 and 2017, Weir qualified for the prestigious National Horseplayers Championship in Las Vegas.

And this year, his first for SportsLine, Weir has been on fire. In January he crushed the Pegasus World Cup, giving out an $8 exacta and a $1 trifecta, winning $757.60. On June 13 Weir hit a $2 superfecta in the Ogden Phipps Stakes that paid a whopping $1,039. He nailed the exacta and trifecta in the Forego Stakes in August for $1,134.50. And he hit the late Pick 4 at Belmont Park on June 18, June 19, June 25, July 2 and July 5 with the June 25 score returning a whopping $2,159.50. Those are just some of his hits this year.

Anyone who has followed Weir this year is WAY UP.

Now, Weir has handicapped the 2020 Derby City Distaff Stakes field, made his picks and constructed his bets. 

One shocker: Weir is against Serengeti Empress, the 8-5 favorite! Instead, Weir's top pick is a horse who should "sit a nice stalking trip" He's also high on a double-digit long shot who "would not be a surprise." These horses could light up the tote board on Saturday. Weir is including these horses in all of his trifectas and superfectas, and so should you. You ABSOLUTELY need to see which horses they are before locking in any picks!

Who wins the 2020 Derby City Distaff? And how has Weir constructed his trifectas and superfectas? ... Join SportsLine right here to get the top Derby City Distaff picks and bets, all from the Saratoga-based racing insider who has been on fire this year!