Original sentence: Mariusz is a national hero and is considered a superstar in his country but tries to maintain his modesty and keep sportsmanship his top priority.Unlike some strongmen, Mariusz retains a very low body fat percentage which helps him with his speed and endurance as one can clearly see when watching him compete
Edited sentence: His enormous popularity is sure to reach American audiences in the years to come with the great possibility of becoming the greatest strongman to have ever lived.Mariusz is a national hero and is considered a superstar in his country but is not one  to think to highly of himself because sportsmanship is his top priority.Mariusz retains a very low body fat percentage which helps him with his speed and endurance as one can clearly see when watching him compete.Unlike any other strongman Mariusz Pudzianowski has dazzled audiences worldwide with incredible feats of strength and athleticism