Using his handicapping acumen and ability to make and interpret speed figures, racing insider and accomplished horseplayer Bob Weir has locked in four best bets for Sunday's races spanning Churchill Downs, Gulfstream Park and Belmont Park. You NEED to see what he has to say before locking in any picks of your own!

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. He nailed the late Pick 4 at Gulfstream Park on both April 9 and April 10, hitting for $827.65 and $394.65. On June 13 Weir cashed a $2 superfecta in the Ogden Phipps Stakes that paid a whopping $1,039. And on both Thursday and Friday he nailed the late Pick 4 at Belmont Park. Those are just some of his hits this year.

Anyone who has followed his lead is WAY UP.

Now, Weir has scoured Sunday's races across the country, found four best bets and constructed his tickets. We can tell you he's high on Above Board, a 4-1 shot in Race 3 at Churchill Downs. Weir will key him on top in trifectas. 

Weir also is high on a double-digit longshot at Gulfstream Park! He says this horse "did not show much in her last race" but could light up the toteboard on Sunday. Weir is including this horse in exactas and trifectas, and so should you. You ABSOLUTELY need to see which horse it is before locking in any picks.

What double-digit longshot is a must-back? And what are Weir's four best bets for Sunday?... Join SportsLine right now to get Sunday's top bets, all from the racing insider who has been on fire this year!