Per Nielsen data so far in 2016 (through May 16) ESPN’s SportsCenter is averaging 479,000 viewers across all telecasts (all times/days) and through a similar period last year (May 17, 1853 telecasts) SportsCenter averaged 509,000 viewers.
The 6pm Monday-Friday SportsCenter telecast (which I bring up only because FS1 is planning to launch a Cowherd-Whitlock 6pm competitor next month) is down 12% vs last year when it averaged 634,000 viewers through this point in the year. This year, it’s averaging 560,000 viewers.
Update: though I took a very macro level view, there are some bright spots. The year-to-date viewership average for the midnight SportsCenter with Scott Van Pelt is up 6.9% versus the same point last year, 699,000 vs 654,000.