World class thoroughbred racing takes place at Churchill Downs in Louisville, Ky., and on Sunday the late Pick 4 begins with Race 6 at 3:36 p.m. ET and ends with Race 9. Before you make any picks, you NEED to know how racing insider and accomplished horseplayer Bob Weir has handicapped the four-race sequence. (Check out all of SportsLine's horse racing coverage.)

A Saratoga Springs-based racing insider and Beyer Speed Figure maker, Weir has studied the races and formulated a Pick 4 ticket in his analysis below. A two-time qualifier for the prestigious National Horseplayers Championship in Las Vegas, Weir has produced multiple five-figure days at the track over the years, including a $60,000 Pick 6 at Del Mar in 2014. This year, he has been on fire. He hit the exacta in the Sam F. Davis Stakes, Tampa Bay Derby and Peter Pan Stakes, the trifecta in the Risen Star Stakes, Blue Grass Stakes and Pennsylvania Derby and the superfecta in the Belmont Stakes, with the Tampa Bay score returning $1,414. Those are just some of his scores in 2021.

Weir has handicapped the late Pick 4 at Churchill for Sunday, made his picks and constructed his tickets.

We can tell you that Weir is high on Dean Martini, a 5-1 shot in Race 6, the opening leg of the Pick 4. "He might be a cut below a few in here, but with the right trip he could be the right play," Weir tells SportsLine. Dean Martini is Weir's top pick in Race 6 and an A horse on his Pick 4 tickets.

In addition, Weir is high on a double-digit long shot on Sunday! Weir says this horse "could get a better pace setup" and could spice up the Pick 4. Weir is including this long shot on his tickets, and so should you. You NEED to see Weir's analysis before making any Pick 4 selections.

So which double-digit long shot can win? And how has Weir constructed his Pick 4 tickets? ... Join SportsLine now to get late Pick 4 selections at Churchill Downs for Sunday, all from the racing insider who has been on fire!