New York's Turf Triple Series kicks off on Saturday with the first leg of the series, the 2021 Belmont Derby at Belmont Park in Elmont, N.Y. The Aidan O'Brien-trained Bolshoi Ballet is the 7-5 morning-line favorite in the Belmont Derby odds. Post time is 5:12 p.m. ET.

Before you make any Belmont Derby 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 has hit the exacta in the Sam F. Davis Stakes, Tampa Bay Derby and Peter Pan Stakes, the trifecta in the Risen Star Stakes and Blue Grass Stakes and the superfecta in the Belmont Stakes, with the Tampa Bay Derby score returning $1,414! Those are just some of his scores in 2021.

Now, he has handicapped the Belmont Derby field, made his picks and constructed his bets. 

One shocker: Weir is high on Du Jour, who is the third choice on the morning line, at 9-2. "He's proven capable on or off the lead and could be tough right back," Weir tells SportsLine. Weir is using Du Jour prominently in his wagers.

However, Weir's top pick is a horse who "proved his quality" in his last start. He also is high on a double-digit long shot who "could prove better" on Saturday. Weir is including these horses in his 2021 Belmont Derby bets, and so should you. You ABSOLUTELY need to see his picks before locking in any of your own!

Who wins the 2021 Belmont Derby? What double-digit long shot is a must-back? And how has Weir constructed his wagers?... Join SportsLine right now to get the top 2021 Belmont Derby picks and bets, all from the racing insider who has been on fire!