DEL MAR, Calif. – Bulletproof One is highly likely to be the shortest-priced favorite in a stakes in the final week of the Del Mar summer season when she starts in Wednesday’s $100,000 Generous Portion Stakes for California-bred 2-year-old fillies. Unbeaten in three starts, Bulletproof One won the CTBA Stakes for statebred 2-year-old fillies at 5 1/2 furlongs on July 31 at odds of 1-2 in her first start in Southern California. Bulletproof One led throughout and pulled clear to win by 6 1/4 lengths. “She’s fast from the gate,” trainer Peter Miller said. “Just fast. She has a high cruising speed.” By Idiot Proof, Bulletproof One was bought privately by Gary Barber and Eclipse Thoroughbred Partners after her win by 9 1/4 lengths against California-bred males in the Everett Nevin Stakes at Pleasanton on July 6. Norberto Arroyo Jr. rode Bulletproof One in the CTBA Stakes, but leading rider Flavien Prat has the mount on Wednesday. Miller said there was confusion as to whether Arroyo would be serving an outstanding suspension on Wednesday when arrangements were made, leading to the change. Arroyo has appealed the suspension, which was for a riding infraction earlier this summer, and is riding on Wednesday. He has the mount on the promising maiden winner Smiling Shirlee in the Generous Portion. There have been discussions about running Bulletproof One in Saturday’s Grade 1 Del Mar Debutante at seven furlongs, but as of last weekend Miller said the Generous Portion Stakes was the more likely goal, especially since she is widely expected to win. “There’s always a chance,” Miller said. “I’d say it’s 90-10 that we stay in. “It’s never the wrong move to win.” Four of the seven fillies that finished behind Bulletproof One in the CTBA Stakes are entered in the Generous Portion – Unchain Her Heart, Wise Rachel, and Cholula Lips, who were second through fourth, and Roses for Laura, who finished sixth. Unchain Her Heart was second throughout and finished a half-length in front of Wise Rachel, who closed well in the final furlong to be third. Both fillies were making their first start in stakes. Unchain Her Heart has speed, which she displayed by winning her career debut in a maiden special weight race against statebred fillies at 4 1/2 furlongs at Santa Anita on June 21. Facing Bulletproof One for the second time this summer is not ideal, trainer Brian Koriner said. “We all feel like we’re running for second,” Koriner said. “It’s hard to run away from one horse.” Trainer Andrew Lerner said over that weekend that I Want One will be withdrawn in favor of a starter allowance race. The Generous Portion Stakes will be the first start in a stakes for Been Studying Her, Smiling Shirlee, and Vegan, who each won a maiden race in her last start. Smiling Shirlee, trained by Jeff Bonde, won her debut by 2 1/4 lengths on July 17, closing from third of nine to prevail as the 5-2 favorite. Six weeks later, Smiling Shirlee is ready for the Generous Portion, Bonde said. “We’ve got no excuses,” he said. “You’re either good enough or you’re not. We’re ready to roll.” Been Studying Her won a maiden race at the Cal-Expo in Sacramento on July 20 for trainer Jerry Hollendorfer. Mike Smith rides Been Studying Her for the first time on Wednesday.