NBC rolled to another easy Sunday victory with “Sunday Night Football,” as its Detroit-San Francisco matchup beat the combined deliveries of the other three major networks, which aired mostly repeat programming prior to the start of the television season.

According to preliminary national estimates from Nielsen, the San Francisco 49ers’ 27-19 victory over the Detroit Lions averaged a 7.5 rating/19 share in adults 18-49 and 18.1 million viewers overall on NBC’s stations from 8:30 to 11 p.m., with the final nationals expected to rise once all West Coast viewing is added. The game earned a 13.9 household rating/23 share in Nielsen’s metered-market overnights, including a 32.1/46 in Detroit and a 24.0/47 in the Bay Area.

Elsewhere, CBS was the only competing network to have a pulse — and that was thanks to football as well. The concluding half-hour of the net’s late-afternoon window of action (mostly Jets-Steelers) averaged a 6.3/19 in 18-49 and 18.7 million viewers overall on the net’s stations from 7 to 7:30. The football game was followed by original installments of “60 Minutes” (roughly 3.2/9 in 18-49, 12.8 million viewers overall) and “Big Brother” (roughly 2.3/6 in 18-49, 7.7 million viewers overall) and a repeat of “The Mentalist” at 10:30 p.m. (0.7/2 in 18-49, 3.9 million viewers overall).

Fox did OK with younger adults despite an all-repeat lineup of its animated comedies. “American Dad” averaged a 2.4/7 in 18-49 and 6.2 million viewers overall in the leadoff half-hour (though this number is inflated by local-market NFL preemptions in some cities) and was followed by “The Cleveland Show” (1.5/4 in 18-49, 3.7 million viewers overall) and back-to-back episodes of “The Simpsons” (1.9/5 in 18-49, 4.3 million viewers overall at 8 p.m. and 1.9/5 in 18-49, 4.1 million viewers overall at 8:30 p.m.) and “Family Guy” (2.0/5 in 18-49, 4.4 million viewers overall at 9 p.m. and 2.0/5 in 18-49, 4.3 million viewers overall at 9:30 p.m.).

ABC aired a repeat of “America’s Funniest Home Videos” (0.9/3 in 18-49, 4.9 million viewers overall) and then introduced “Revenge” to its new night by airing a trio of encores from its rookie season, averaging a 0.6/2 in 18-49 and about 3.1 million viewers overall.

Preliminary 18-49 averages for the night: NBC, 6.5/17; CBS, 2.5/7; Fox, 2.0/5; ABC, 0.7/2.

In total viewers: NBC, 15.7 million; CBS, 9.0 million; Fox, 4.5 million; ABC, 3.5 million.