"It was also a chance to play on a great defense and for one of the best defensive coordinators in the country, Coach (John) Chavis.
"Coach Chavis knows how to coach linebackers and that is one of the main reasons I'm here."
Alexander reports that the veteran coach has no problems getting him motivated.
"Coach gets me going," said Alexander. "He likes to see us work hard. All of the linebackers are working hard.
"All of us freshman are trying to learn, so we can contribute to the team."
The four star Alexander is one of several talented reinforcements who signed on with the Tigers in February.
"It's really crazy," said Alexander. "I feel like we are going to be one of the best group of linebackers to come out of LSU.
"They have had some great linebackers come through here, but we feel like we have a lot of talent.
"We are just working hard, listening to the older players and learning as much as we can."
One seasoned Tiger tackler has been especially attentive to the talented Alexander.
"Luke Muncie has been there for me," said Alexander. "He's shown me all of the plays. After film, he takes time to show me all of the fronts and things like that.
"He always has time for me and he is always trying to help me learn everything I need to know."