The very first one I looked at you skewed the numbers.
2017 Henry Ruggs, DPJ, Devonta Smith, Tee Higgins and Jerry Jeudy were 1, 2, 3, 4, 5 for WR's. Every one was drafted and Ruggs, Smith and Jeudy were 1st round picks. Higgins may have been too. Tough to have 6 out of 10 go undrafted when the top 5 guys were all drafted
2018 Justin Shorter, Ja'Marr Chase, Terrence Marshall, Amon Ra St Brown, Jaylen Waddle, Derrion Kendrick all were drafted. Jordyn Adams was drafted...........in the MLB. Crazy how in your mind -- 7 out of 10 went undrafted, yet 6 out of 9 were drafted, with Adams leaving to play baseball.
I'm not even wasting my time looking up the others. Quite obvious you are just making stuff up as you go