Betrbegone—the longest shot on the board— held off a wall of challengers and scored a stunning three-quarter-length victory over Prime Engine in the $50,000 Seattle Slew Handicap for 3-year-old colts and geldings.

Ridden by Leonel Camacho-Flores at 116 lbs, Betrbegone ran 1 1/16-mile in 1:42.79 and paid $68.60, $34.80 and $19.80. David Martinez is the winning trainer for owner/breeder Howard Maggard of Yakima.

The $2 win payoff is the second largest in 38 runnings of the Seattle Slew Handicap and seventh largest ever for a stakes at Emerald Downs.

Prime Engine, ridden by Leslie Mawing at 118 pounds, rallied to the lead past mid-stretch, but was out-finished by Betrbegone on the rail. Prime Engine, recording his second straight runner-up finish, paid $5 and $3.80.

O B Harbor, ridden by Jake Barton at 119 lbs, held third and paid $6.60.

Percy Fawcett, Thetrailerguy, Gloria’s Angelo, Daytona Beach, Senna, John’s Not Bluffin, Fire the Trainer and Fooled Again completed the order if finish.

Thetrailerguy, the 2-to-1 favorite following his win in the Coca-Cola Handicap last month, failed to deliver a serious rally and finished fifth. His three-race win streak snapped, Thetrailerguy became the 11th straight Seattle Slew favorite to go down in flames.

Coming off an eighth-place finish in the Coca-Cola, Betrbegone was virtually ignored by bettors and perhaps his competitors too. Gunned to the lead from the No. 2 post-position, Betrbegone led through fractions of :22.77, :45.82 and 1:10.64. With O B Harbor in pursuit, Betrbegone straightened into the lane with a short lead, and it appeared those two might battle to the wire for the victory.

But Prime Engine loomed ominously, sweeping four-wide into the lane to collar Betrbegone inside the eighth pole. From there, a victory seemed imminent, but Betrbegone responded gamely and came back on for the victory.

“I really wouldn’t have done anything different, my horse ran good,” Mawing said of Prime Engine. “He settled well and I thought I had him in a perfect spot. The pace had to be fast and I thought I’d beat that horse (Betrbegone) when I came up to him, but he outran me.”

Camacho-Flores, the riding champion this winter at Portland Meadows, has had a relatively slow meet, beginning Sunday with just 10 wins. But he rode Betrbegone with confidence, and took good advantage of the gelding’s natural speed.

“I was thinking that this horse has good speed and if he breaks good, he might take the lead,” Camacho-Flores said. “We were going quick early but it was his own pace. I was sitting still and he was comfortable. As soon as we hit the turn, I thought ‘I still have some horse left. We should win this race.’”

A Washington-bred by Parker’s Storm Cat-Final Drummer, Betrbegone is 3-1-0 in six starts with earnings of $52,238, including $27,500 for Sunday’s win.

NOTES: The $0.50 Pick 5 returned a season-high $12,207.85 to one winning ticket. The track record is $22,203 on June 2, 2013. . .Polish Dollar ($12.80) got back on the beam with a head victory in the $21,000 sub-feature for 3-year-olds and up. Ridden by Leslie Mawing, Polish Dollar ran 6 ½ furlongs in 1:15.92, recording his 15th career victory at Emerald Downs and increasing his career earnings to $148,762. Owned by Sharon Radke and trained by Bob Meeking, the 9-year-old Polish Gift gelding is 15-6-7 in 45 lifetime starts. . .Even with Thetrailerguy finishing out of the money, Julien Couton rode three winners Sunday and pushed his meet-leading total to 54 wins. It was Couton’s 18th multiple win day at the 37-day-old meeting. . .Blaine Wright led trainers with two wins. . .Jockey Connie Doll notched her first win of the meet aboard Jacango ($14.60) in Sunday’s first race for Quarter Horses. It was the fourth win of the meet for Pablo Madrigal, tops among Quarter Horse trainers. . .Congratulations to track announcer Matt Dinerman, who celebrates his 23rd birthday Monday. . .Live racing resumes Friday with a seven-race card at 6:45 p.m. Simulcast wagering is offered daily, Mondays and Tuesdays in the Quarter Chute Café and Wednesdays thru Sundays in the main facility. Thursday’s action includes opening day of Del Mar’s 40-day meeting, with first post 2 p.m.