HALLANDALE BEACH, Fla. – Monty Haul and Gryvon, each coming off an impressive victory during the winter meet, will vie for favoritism and face seven other optional-claiming rivals in Thursday’s $42,000 main event at Gulfstream Park, carded at seven furlongs. Monty Haul forced the pace before edging away to a 2 1/4-length victory under similar two-other-than optional-claiming conditions going a mile March 14. Trained by Eddie Coletti, he earned a 92 Beyer Speed Figure. The victory was the 10th in 25 career starts for Monty Haul, who was claimed for $40,000 last summer at Parx and transferred to Coletti’s barn here last winter. :: Bet Gulfstream Park with DRF Bets and get FREE access to this article and all of DRF Plus, including Gulfstream selections, video, and real-time analysis. Gryvon has won two of three starts since joining trainer Jorge Navarro’s stable this past winter. His latest victory was a four-length decision over Manhattan Johnnie, who flattered the effort by winning an allowance race at Belmont on Saturday. Trev, the third-place finisher from the race, also returned to win his next start. Black Diamond Cat need only finish fourth or better to eclipse the $500,000 mark in earnings. Now 8, the son of Wildcat Heir is winless over the past year and a half, although he did turn in a huge effort two starts back when finishing second behind Tarpys Goal. He earned a 98 Beyer in the seven-furlong race Feb. 25. Thursday’s feature will be the penultimate leg of the Rainbow 6 sequence, which features a carryover of $130,294. There will be a mandatory payout of the Rainbow 6 jackpot on Friday. Key Contenders Monty Haul (Last 3 Beyers: 92-86-81) ◗ He continues to progress from a Beyer standpoint, having improved with each of his last four starts. ◗ His work tab has been limited since his last race, although he’s always been a horse who produces a lot more in the afternoon than he does in the morning. The six furlongs he breezed in 1:17.40 on March 2 was little more than a maintenance move. Gryvon (Last 3 Beyers: 95-59-82) ◗ The 95 Beyer he earned for his victory April 4 was by far the best of his career, although he did race out in the best part of the track, away from the dead rail. ◗ He has had seven weeks off since that effort. Black Diamond Cat (Last 3 Beyers: 70-98-71) ◗ His last victory came in the Montbrook Stakes on Sept. 14, 2013. It was the second of two straight stakes wins and the third of four over a 13-week period for him, including the Ponche Handicap at Calder. Kings Over (Last 3 Beyers: 82-71-91) ◗ He has made just one start in five months – a second-place finish as the odds-on favorite against an average group of midlevel conditioned-claiming types going a mile March 18.