So looking at the 800s. Here are the people that came in seeded in the top 10 that didn't make it to Eugene.
I list them by their seed times and what round they went out in.
East Men
3 Alex Amankwah SR Alabama 1:45.91 - 1st round
5 Julian Parker SR LSU 1:46.17 - 2nd rond
7 Jacopo Lahbi SO Alabama 1:46.79 -2nd round
10 Blair Henderson SO LSU 1:47.03 - 2nd round
West Men
6 Ricky Faure FR Wyoming 1:47.59 -1st round
8 Luke Lefebure SR Stanford 1:47.73 - 1st round
9 Hector Hernandez JR Texas A&M 1:47.75 - 2nd round
10 Joe McAsey JR Illinois 1:47.91 -2nd round
East Women
5 Elizabeth Whelan JR North Carolina 2:03.76 -1st round
8 Ce'aira Brown JR Hampton 2:04.17 - 2nd round
10 Taneisha Cordell SR Miami 2:04.65 -2nd round
West Women
None - all of the top 10 seeds made it out.