Original sentence: Hernández throws a fastball that has been clocked as high as 100 mph and often uses a cut fastball, which comes in just a bit slower but with more movement and sink as it approaches the batter
Edited sentence: He is already considered the Mariners' top pitcher at only 21 years of age.Hernández throws a fastball that has been clocked as high as 100 mph, although he does not rely entirely on overpowering velocity.Highly touted as a prospect, he is widely considered to have the potential to turn into one of the best pitchers in baseball.Instead he often uses a cut fastball, which comes in just a bit slower but with more movement and sink as it approaches the batter