The start of the Brian Kelly era attracted a large television audience for Notre Dame.
Saturday's preliminary rating was up 77 percent from last year's opener. NBC said Sunday that the Fighting Irish's 23-12 win over Purdue drew a 2.3 overnight rating and 6 share. It was up 15 percent from the last Notre Dame home game against Purdue in 2008.
The 2009 opener against Nevada earned a 1.3 rating and 3 share.
Ratings represent the percentage of all homes with televisions tuned into a program. Shares represent the percentage of all homes with TVs in use at the time. Overnight ratings measure the country's largest markets.