The second leg of the Triple Crown will be on the line when 10 three-year-old horses leave the starting gate in the 2021 Preakness Stakes on Saturday. Kentucky Derby winner Medina Spirit is 3-1 in the current 2021 Preakness Stakes odds. Post time at Pimlico Race Course is 6:47 p.m. ET.

Before you make any Preakness Stakes 2021 picks, you NEED to see what racing insider 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!

Last year, his first for SportsLine, Weir was on fire. In June, Weir hit a $2 superfecta in the Ogden Phipps Stakes that paid a whopping $1,039. He crushed the exacta and trifecta in the Forego Stakes in August for $1,134.50. 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.

This year, he hit the exacta in the Sam F. Davis Stakes and Tampa Bay Derby and the trifecta in the Risen Star Stakes and Blue Grass Stakes, with the Tampa Bay Derby score returning $1,414! Those are just some of his scores in 2021.

Anyone who has followed Weir is WAY UP. Now, he has handicapped the 2021 Preakness Stakes, made his picks and constructed his bets. 

One shocker: Weir is almost completely fading Medina Spirit, even though he won the Kentucky Derby and is the 9-5 favorite. "If you didn't love him at 12-1 in Kentucky, it's hard to accept him two weeks later as the favorite in the Preakness," Weir told SportsLine.

Instead, Weir is high on a double-digit long shot who is "the one to fear late." Weir is including this horse in his 2021 Preakness Stakes bets, and so should you. You ABSOLUTELY need to see his picks before locking in any of your own!

Who wins the 2021 Preakness Stakes? And which double-digit long shot is a MUST-BACK?... Join SportsLine right now to get the top 2021 Preakness Stakes picks and bets, all from the racing insider who absolutely nailed this year's prep races!