There are several athletes who have been mentioned while discussing the best athlete of all time, including Muhammad Ali, Usain Bolt, Serena Williams, Cristiano Ronaldo, and Tiger Woods.

The topic of who is sport's all-time greatest athlete will always be impossible because there are so many sports, eras, and disciplines to consider, but that doesn't make it any less interesting for fans to debate.

The argument resurfaced in our minds as Tom Brady was apparently about to put up his cleats as not just one of the best American football players in history but also one of the greatest athletes of all time.