The versatile dark bay son of Black Minnaloushe-Water Course (by Irish River), trained by Patrick Biancone, made it back-to-back stakes wins after winning the With Anticipation on the Saratoga lawn Sept. 3.
"Last time he was a turf horse," Biancone said. "This time he was a Polytrack horse. Next time, hopefully, he'll be a dirt horse. This race was 17 days back from his last start, so we'll see how he comes out of the race before seeing our next step. He ran super."
Breaking from the inside post in the field of eight, Stream Cat trailed the field after a half-mile and was still seventh after six furlongs before making good progress with a quarter mile to go. He caught Rungius and Jesus Castanon in mid-stretch and drew clear late to win in a time of 1:46 2/5 for the 1 1/16-mile distance.
"I had a lot of faith in his closing ability," Stevens said of the winner. "When you give him the cue, he switches gears like a pro. The Polytrack is not just for turf horses, although it does give turf horses the ability to show their best."
Rungious, a 29-1 shot, held on gamely for second, one length in front of 17-10 favorite Cab, who had Patrick Valenzuela in the irons.
"He's a nice little horse," said Bernie Flint of the runner-up. "He's a little green. He got to looking into the crowd when he switched leads, and he lost interest for a minute. He was wearing blinkers and it got him back into the race. It's a nice horse that beat him. He just got outrun today by a better horse."
Cab was coming off a 5 3/4-length maiden win over six furlongs at Saratoga Sept. 2.
"We really had a perfect trip," said Valenzuela. "Turning for home, I thought I had plenty of horse to get by the leaders, but he just didn't seem to try to get by them. He's the type of horse that maybe with blinkers would improve."
Short Circuit, ridden by Mark Guidry, led Rungius and Cab through the first half-mile in splits of :23 4/5 and :48 1/5 before giving way to the pressure after six furlongs in 1:13 3/5.
Stream Cat, who debuted with a fifth-place finish at six furlongs at Saratoga Aug. 13, has now won two of three career starts with earnings of $101,670 for owners Fab Oak Stable, Robert E. Hurley and Team Derby Dreams Stable. A $120,000 Keeneland yearling purchase a year ago, Stream Cat was bred in Kentucky by Matthews Breeding and Racing Ltd.
The second choice paid $7, $4.40, and $3.80. Rungius returned $15.20 and $8.20. Cab's show was $3.
Catcominatcha, Short Circuit, Deputy G, Devilofarush, and He's a Dixie Boy followed. Raywick scratched.