ETOBICOKE, Ontario – The talented River Seven makes his belated season debut Saturday at Woodbine in the $150,000 Queenston, a seven-furlong stakes that serves as a stepping-stone to the $1 million Queen’s Plate. River Seven faced the best of his division at 2 last year. He was a distant third behind eventual champion 2-year-old and Canadian Horse of the Year Uncaptured while debuting in the June 30 Clarendon Stakes. A month later, he rallied for second behind Uncaptured in the six-furlong Vandal Stakes. After ending up second as the 2-5 favorite in a two-turn maiden special weight race Sept. 3, River Seven won the Grade 3 Grey Stakes over a good field that included Uncaptured. He hasn’t started since the Oct. 7 Grey, in which he tied his career-best Beyer Speed Figure with an 85. Trainer Nick Gonzalez said River Seven has trained encouragingly since encountering a stumbling block in Florida. “I had a minor setback with him over the winter – not anything serious, but I got started a little later than I wanted to,” Gonzalez said. “We got four or five good works into him at Gulfstream. He breezed awesome here the other day. He’s a very good horse.” Gonzalez said the nine-furlong Plate Trial Stakes is next on River Seven’s agenda. “The way the races are spread out, you have (the Queenston), the June 9 Trial, and then the July 7 Plate,” Gonzalez said. “You have four weeks, four weeks and four weeks. That’s the way we’re going to approach it.” Trainer Mark Casse entered Dynamic Sky, Star Contender, and Jagger M, a trio that makes up half the field of Ontario-bred 3-year-olds. Dynamic Sky was on the Kentucky Derby trail. He raced three times over the winter at Tampa Bay Downs, where he won the Pasco Stakes, ran second in the Grade 3 Sam F. Davis, and was fourth in the Grade 2 Tampa Bay Derby. Dynamic Sky, who was scratched from last Sunday’s Wando Stakes, was a non-threatening ninth last time out in the Grade 1 Blue Grass at Keeneland. “I don’t know why he didn’t do better in his last start,” Casse said. “We thought he trained good up to it. We were expecting a big race out of him, and he just didn’t run.” Star Contender was one of the top 2-year-olds on the grounds last year, winning the Cup and Saucer Stakes on grass. He was beaten by double-digit lengths twice this year in stakes at Gulfstream and Keeneland. Jagger M earned his first victory in his fourth career start last out, a six-furlong maiden special weight race at Keeneland April 13.