The lack of a standout in the BC Filly and Mare Sprint is leading the connections of quite a few horses to try their horses in the $1 million race if they can, rendering a full field of 14 a real possibility. “They’re telling us this race is wide open, so we think we’ll give it a shot,” said Eric Reed, trainer of Rinterval. Reed said the availability of jockey Rafael Bejarano was one factor in leading him and owner Jerry Jamgotchian to run Rinterval, a 5-year-old mare who has never raced on dirt in 24 career starts and whose claim to fame is her runner-up finish to Zenyatta in the Clement Hirsch in August. Meanwhile, a number of contenders continue to put in serious workouts, including Rightly So, whose victory in the Grade 1 Ballerina will make her one of the race favorites. “We’re right on schedule with her,” trainer Tony Dutrow said Wednesday from Delaware Park. “I’m very happy. She’ll have two more works before we ship, the last being on Oct. 30 or 31.” Rightly So is one of at least three runners who will have to be supplemented for a $90,000 fee, along with Dubai Majesty and Jessica Is Back. From California, trainer Jim Cassidy said Wednesday that he is “leaning” toward the Filly and Mare Sprint over the Ladies’ Classic for Evening Jewel, third-place finisher Saturday in the Queen Elizabeth II Challenge Cup at Keeneland. From overseas, Lady of the Desert, the standout 3-year-old filly based in England, will not be coming for the Filly and Mare Sprint as was originally contemplated, leaving no major European contender for this race. This will be the first year the Filly and Mare Sprint will be run at seven furlongs on dirt. Its 2007 inaugural at Monmouth Park was run at six furlongs, while the last two runnings were at seven furlongs on Pro-Ride at Santa Anita.