Alternate Rock established herself as a runner of quality when she became stakes-placed last year as a 2-year-old, but she seems to have taken her game to a new level since moving to two turns in recent times and her record points her out as the chief contender in Sunday’s eighth race at Gulfstream Park. The first-level allowance is for 3-year-old fillies at a mile and 70 yards on Tapeta. A field of seven is set to start, among them Coco, who owns the field’s best last-race Beyer Speed Figure, and Starship Aurora and Artifact, who both exit the Martha Washington Stakes at Gulfstream. Alternate Rock finished second in the Martha Washington, a 1 1/16-mile race on Tapeta on June 10. It was her second start at two turns, and she earned a career-high Beyer of 77. Alternate Rock had made her two-turn debut one race prior at a mile on turf at Gulfstream and won the first-level allowance going wire to wire on April 20. The success was not by accident. Alternate Rock is bred to make her mark routing. Her sire, Alternation, was a multiple graded stakes winner at two turns who earned more than $1 million. Kitzys Rocket, the dam of Alternate Rock, registered her two wins at distances of 1 3/16 miles and 1 3/8 miles. Alternate Rock had won a pair of sprint races – one on dirt and the other on Tapeta – ahead of making her two-turn debut on the turf at Gulfstream. :: Take your handicapping to the next level and play with FREE DRF Past Performances - Formulator or Classic.  She will start from post 5 and while she faces other speed Sunday, she might be able to track the leaders under Hector Diaz Jr. Jose D’Angelo trains Alternate Rock and also will saddle Rachels Song, who is coming off a more than 10-length win in a $35,000 maiden-claiming route at Gulfstream. She was claimed out of the race run on Tapeta by owner Carlo D’Amato. D’Angelo wins at a 25 percent rate first off the claim, according to Daily Racing Form statistics. Rachels Song, who wired the field, could face new pace challengers in Pawky and Lady Hamilton. Both are trained by Saffie Joseph Jr. and are looking for their first wins on Tapeta after racing on turf at Gulfstream. Starship Aurora could get a stalking trip. She exits the Martha Washington, finishing fifth in what was her stakes debut. Prior to the race, Starship Aurora won back-to-back starts on Tapeta at Gulfstream. She is a half-sister to two-time stakes winner Lovely Luvy, an earner of $308,333, and 13-time winner Wildly Good Lookin, who has earned $389,536. If the pace is honest, it would benefit Artifact. She also comes out of the Martha Washington, finishing seventh. A few races earlier, she used stalking tactics to capture a $25,000 starter allowance at a mile on turf at Gulfstream. Artifact will be back on Lasix after racing without the diuretic in the Martha Washington, while the same is true for both Alternate Rock and Starship Aurora. Coco owns the field’s best last-race Beyer, a 79 for her more than six-length win in a $25,000 starter-allowance route on Tapeta last month at Gulfstream. :: Want to learn more about handicapping and wagering? Check out DRF's Handicapping 101 and Wagering 101 pages.