The first half of Del Mar's 83rd summer season has been highlighted by safe racing, full fields and sizeable increases in wagering and on-track attendance. Fueled by record California purses of over $800,000 per day, field size has averaged 9.90 for turf races and 8.83 for main track events. Together, they combine for a nation leading 9.30 horses per contest, well above last year's average of 8.45. Through the first 15 days of the summer season, total wagering is $297,044,168 for a daily average of $19,802,945, an increase of 6.7%...