UPDATE: Last Saturday's NASCAR All-Star Race had a 1.5 rating and 2.5 million viewers on FS1, down a tick in ratings and 14% in viewership from last year (1.6, 2.9M) and down 25% in both measures from 2016 (2.0, 3.3M).
It was the lowest rated NASCAR All-Star Race since at least 2005 and - per Sports Business Daily - the least-watched since at least 2003. The previous lows were set last year.
Not surprisingly, the All-Star Race trailed the competing Celtics-Cavaliers (4.0, 6.8M) and Capitals-Lightning (1.7, 2.9M) conference final games. Even so, it ranked as the fourth-most watched sporting event of the weekend - trailing the aforementioned games and Rockets-Warriors on Sunday night (4.6, 7.8M).
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Original post 5-20-2018:
All-Star TV ratings https://twitter.com/A_S12/status/998212078006661120— Adam Stern (@A_S12) May 20, 2018