Who is the best athlete at each major sport?

In your opinion.

Template

Football:
Soccer:
Baseball:
Basketball:
Hockey:
Boxing:
Golf:
Running:
Cycling:
Swimming:
Gymnastics:
Figure skating:
Weightlifting:

Feel free to add more. Volleyball, etc.

Assuming from your title that you want the best athlete, not necessarily the greatest player. also going current form only

Football: Myles Garrett or Micah Parsons
Soccer: Mbappe
Baseball: Shohei Ohtani (not sure, don't watch much baseball)
Basketball: Giannis
Hockey: Connor McDavid (also not sure, don't watch much hockey)
Boxing:
Golf:
Running: Fred Kerley (sprint) and Eliud Kipchoge (distance)
Cycling:
Swimming: Caeleb Dressel
Gymnastics:
Figure skating:
Weightlifting:

If we are talking historical some of these aren't remotely close

Football: Tom Brady
Hockey Wayne Gretsky
Golf Tiger Woods

And then some are a bit murkier. MJ vs LeBron is a legitimate discussion. Baseball also is wide open

Cycling is Danny MacAskill if you include mountain biking

Not clear enough if this is current or all time.