AFTER a run static stretching (no movement) is best, but mixing it with dynamic stretching as well cannot hurt.
Dynamic stretching has one setback, it looks plain ridiculous at times. However, it makes you feel SO much better during races and runs. But a few of them look ridiculous...
https://www.youtube.com/watch?v=DkCZym9CT54
https://www.youtube.com/watch?v=CvIGjwZ25YA
https://www.youtube.com/watch?v=f65aqrIyYYc