As Aristotle said, "One swallow [meaning "bird"] does not a summer make." Similarly one match doesn't make a career (or necessarily change a whole lot).
Keep in mind all five were wrestling away after two weeks off. Michigan is a tough top five team.
Nolf has proven himself beyond a doubt over 2 1/2 years. Retherford over 3 1/2 years.
• Retherford has 47 career falls. Nolf has 41 (and a year to pass him). Nickal has 33.
• Nolf has a 54% falls rate compared to Nickal's 43.4% and Retherford's 42%.
• Nolf's career win rate is slightly higher than Retherford's: 97.4% to 97.3% and Nickal's 96.1 %.
• And where Nolf puts real distance on everyone (except David Taylor at this point, whom he is also likely to pass) is career bonus point percentage: Nolf is at 90.8%, Nickal at 75% and Retherford at 74.1%.
•If trends continue, Retherford will likely win three titles; Nolf will likely win three, and Nickal also has the chance at 3. It's theoretically possible for Hall and Joseph both to get four titles, but that will be a real challenge of course.
• But Retherford will likely finish: 5-1-1-1 whereas Nolf will likely finish 2-1-1-1.
Based on these statistics, I would order (project) the top two as:
After that, I'm less certain who will be third or fourth or fifth:
A lot can change of course, but if we are trying to be empirical, the above stats should count for something. One might also factor in the number of points each has or likely will score at NCAAs, among other metrics.