Watch Now: Boomer and Gio: Horse racing still taking place (2:39)

Horse racing continues to take place daily during the coronavirus pandemic, and on Sunday the Steve Asmussen-trained Copper King will try to finally break his maiden when he leaves the starting gate in a maiden special race at Churchill Downs in Louisville, Ky. This 4-year-old son of Medaglia d'Oro has five seconds and four thirds in 11 career starts. He is coming off a third-place finish on May 24 and has been installed as the 4-1 morning-line favorite in Race 10, a one-mile race that drew 11 entrants. 

The race is included in Bob Weir's four best bets for Sunday. A racing insider and accomplished horseplayer, Weir has scoured all of the races around the country on the day and locked in four best bets spanning Churchill Downs, Gulfstream Park and Belmont Park. Before making any wagers on Sunday, June 21, you'll want to see his horse racing picks at SportsLine.

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. 

This year, his first for SportsLine, Weir has been on fire on his horse racing picks. In January, he crushed the Pegasus World Cup, giving out an $8 exacta and a $1 trifecta, winning $757.60. In February's Sam F. Davis Stakes, he gave out a $0.50 superfecta that paid $150.75. In March, Weir correctly pegged Wells Bayou to win the Louisiana Derby.

He nailed the late Pick 4 at Gulfstream Park on April 9 and 10, hitting for $827.65 and $394.65, respectively. He cashed the Pick 4 again at the same track on April 30, May 2 and May 15. On June 13, Weir hit 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. Anyone who has followed Weir this year is way up.

Now, Weir has scoured Sunday's races across the country, found four best bets and constructed his tickets. He's only sharing them here.

Top horse racing predictions for June 21

Weir's high on Above Board, a 4-1 shot in Race 3 at Churchill Downs. This 7-year-old gelded son of Eskendereya has eight wins, three seconds and three thirds in 22 career starts. He last raced in September, finishing fourth in a starter optional claiming race at Churchill.

Above Board is trained and owned by Steve Asmussen, who has placed him aggressively on Sunday. "This 7-year-old gelding can be the controlling speed," Weir tells SportsLine. 

Weir also is high on Hot Little Honey, a 4-1 shot in Race 7 at Belmont Park. This 3-year-old daughter of Palace has two wins and one third in five career starts. She is coming off a fourth-place finish on March 15.

Hot Little Honey may have the perfect running style for Sunday's race. "There's a lot of speed in this six-furlong claiming race for 3-year-old fillies," Weir said. "Hot Little Honey may be the beneficiary." 

How to make horse racing picks for June 21

In addition, Weir also is high on a double-digit long shot at Gulfstream Park. This horse "did not show much in her last race" but could light up the tote board on Sunday. Weir's sharing his best bets only at SportsLine.

What double-digit long shot is a must-back? And what are Weir's four best bets for Sunday? Visit SportsLine to see Weir's horse racing bets for Sunday, and find out.