I'm literally calculating them from 100m dash times ran by NFL players (ex. Jeff Demps). They have performed these sometimes on specialized treadmills. This dude is 5'10" when the fastest guys tend to be over 6ft tall (just like with sprinters). This was a vid his strength coach released to try to hype him, but he still couldn't cut it. Never played a game:
You're pulling speeds of guys in the middle of games (that one carrying a ball) wearing ~20 pounds of pads and 5 pounds of helmet. Very, very few NFL plays go beyond 20 yards. It's extremely rare that you see the players with the fastest top speeds, usually the WRs, given a full ~40m fly to reach their top speed without breaking, cutting, looking over their shoulder, etc.
That top speed for Ronaldo was calculated on an 80-yard sprint without the ball. Furthermore, it looks like whoever made that jpeg meme for Ronaldo got a bit excited by unofficial live tracking because his top measured speed in that stretch against the Spanish team at the World Cup was actually
33.98 km/h = 21.1 mph. I thought that was off. I am deeply skeptical that 21.1mph is the fastest time a soccer player has ever clocked in a game. Pretty sure I've seen Gareth Bale recorded in the 22mph-23mph range.
https://talksport.com/football/3881...f-any-player-at-the-fifa-world-cup-in-russia/