NBC easily captured Sunday’s primetime ratings race with four hours of U.S. Olympics trials, with gymnastics drawing the best numbers. ABC, meanwhile, isn’t making much noise on the night with its feel-good unscripted combo of ”Secret Millionaire” and ”Extreme Makeover: Weight Loss Edition.”

According to preliminary national estimates from Nielsen, NBC won every hour in demos Sunday, starting with track and field trials (1.4/5 in 18-49, 5.6 million viewers overall) and then growing at 8 p.m. with swimming trials (2.1/7 in 18-49, 7.7 million viewers overall). And from 9 to 11 p.m., the women’s gymnastics trials earned a big 3.2/9 in 18-49 and 9.9 million viewers overall for the highest-rated U.S. Olympics trials event since 2000. The Summer Games on NBC start from London on July 27.

Elsewhere, ABC ran second among the broadcasters but didn’t exactly light up the ratings scoreboard with its firstrun episodes of ”Secret Millionaire” (1.1/4 in 18-49, 5.0 million viewers overall) and ”Extreme Makeover: Weight Loss Edition” (1.2/3 in 18-49, 3.9 million viewers overall). Each delivered its lowest-rated original installment to date.

Fox hung in there with encores of ”The Simpsons” (1.4/5 in 18-49, 3.1 million viewers overall), ”Bob’s Burgers” (1.2/4 in 18-49, 2.4 million viewers overall), ”Family Guy” (1.4/4 in 18-49, 3.1 million viewers overall) and ”American Dad” (1.4/4 in 18-49, 3.0 million viewers overall). Excluding sports, the net was the No. 1 broadcaster in 18-49 with these animated shows from 8 to 10.

CBS had a quiet night, seeing its best numbers for ”60 Minutes” (1.1/4 in 18-49, 8.2 million viewers overall), which followed golf action. From 3 to 6:45 p.m. ET, golf’s ATandT National averaged a 4.6 household rating/10 share in Nielsen’s metered markets , nearly triple last year’s rating (1.6/4).

After ”60 Minutes,” the net struggled with encores of dramas ”Hawaii Five-0” (0.7/2 in 18-49, 4.6 million viewers overall), ”The Good Wife” (0.5/2 in 18-49, 3.9 million viewers overall) and ”The Mentalist” (0.7/2, 4.3 million viewers overall).

Preliminary 18-49 averages for the night: NBC, 2.5/8; ABC, 1.2/4; Fox, 1.1/4; CBS, 0.8/2; Univision, 0.9/3; CBS, 0.8/2.

In total viewers: NBC, 8.3 million; CBS, 5.2 million; ABC, 4.5 million; Fox and Univision, 2.5 million.