NBC Sports' broadcast of Giacomo's surprise win at the 131st running of the Kentucky Derby (gr. I) notched an 8.2 overnight rating and 19 share, slightly down from an 8.3 rating in 2001, 2003, and 2004.
Saturday's rating was the fourth-highest overnight rating for a Kentucky Derby broadcast since 1992, according to overnight ratings released Sunday by Nielsen Media Research.
The ratings built throughout Saturday's broadcast, peaking at an 11.5/26 from 6-6:30 p.m. ET, as the 50-1 Giacomo became the second-longest shot ever to win the Derby (Donerail, 1913).
Saturday's prerace segment (5-5:45 p.m. ET) generated a 6.0/15, compared to last year's 6.0/14. The race segment (5:45-6:45 p.m. ET) drew a 10.0/23, down 1 % from 2004 (10.1/22).
The top-rated individual markets for the full telecast were: 1) Louisville 30.6/62; Tampa 12.5/28; Cincinnati 12.0/30; Orlando 11.8/24; Fort Myers 11.8/24; Knoxville 11.5/24; Philadelphia 11.4/24; Hartford 11.3/24; St. Louis 11.0/24; and West Palm Beach 11.0/24.
National ratings for the race segment are expected Tuesday while complete national ratings are expected Thursday.
Giacomo will continue on to the Preakness Stakes (gr. I) from Pimlico Racecourse on Saturday, May 21, trying to become the first horse to win the Triple Crown since Affirmed in 1978. NBC's coverage from Baltimore begins at 5 p.m. ET.