He seems to be a hard worker, if this article means anything;

https://www.jsonline.com/story/sport...ers/577439002/

How can he possibly fail? Tutored for two years by Terrell Buckley as both a cornerback and punt returner.

Naturally, Alexander wanted to continue fielding punts at Louisville, but freshmen rarely are exposed to such unforgiving pressure. Alexander was among 10 candidates vying for the job in his first season, but cornerbacks coach Terrell Buckley – who doubled instructing punt returners – said their choice was easy.
Lots of quotes and comments from Buckley in this article.