Wagering from all sources on Saturday’s Kentucky Derby day program was the second-highest in history, totaling $192.6 million and only 1 percent off the record set in 2015, Churchill Downs Inc. has reported. On-track wagering on the full Derby Day racing card, including the 142nd Derby, was up 2 percent to $23.5 million — just under the record $23.7 million in 2012. On-track wagering on the Kentucky Derby itself totaled $11.3 million, a decrease of 6 percent compared to last year, the track said. It should be noted that Churchill carded an extra race this year over the number of...