MIAMI – The $75,000 Bob Umphrey Turf Sprint has traditionally been a part of the Summit of Speed undercard, as the five-furlong dash fits the theme of Calder’s marquee event just perfectly. But track management opted to break the race out on its own this year to anchor Monday’s special July 4th program, with the weather likely becoming a key component when it comes to both the final makeup and outcome of the race.