Someone posted that Stern has sat out relays in the past so I looked at last year’s results. The prelim results aren’t archived but Stern swam in finals (or consol finals) as the freestyle leg in 4 relays so it would appear she swam in prelims last year as well as finals in 4 relays. (Amherst made top 8 in all but 1 of those relays — a result that seems unlikely without Stern.)
I believe that the reference to the past was with respect to the 2009 meet, where both Kendra and her sister Meaghan sat out at least the 400 Medley relay at finals to rest for their other events. There may have been one more but I don’t remember specifically.