If there was a book about phone voicemail etiquette, the first chapter would probably be titled "make sure it's the right number before you leave the voicemail."

It appears that Memphis offensive coordinator Chip Long may have broken that rule in an attempt to recruit former Tennessee junior running back Jalen Hurd, who announced his intentions to transfer earlier this week.

Instead of leaving a voicemail for Hurd, Long left his message on the phone of another Tennessee student, Davis Dyer, according to a report from Outkick The Coverage's Clay Travis.

Here is the full message, which lasts one minute and 27 seconds.

"I know it's been a crazy stressful week for you," Long says in the voicemail. "Maybe this is a little too soon, but I just want to get my foot in the door and say we know coach (Butch) Jones and coach (Mike) Debord were not welcoming you very well.

"But if you were to consider the University of Memphis, we would completely commit to an I-formation offense off the bat, and we think you could thrive in that."

It is unclear if Tennessee has already given other coaches written permission to contact Hurd. A written notice is required by the NCAA for a coach to discuss transfer opportunities with an athlete.

Hurd was reportedly unhappy with the way he was being used in the Vols' offensive scheme for the past two seasons, which contributed to his decision to bolt from the program. A potential position change to tight end or wide receiver may also be on the table at his next school.

Travis reached out to the Memphis football program for comment on the voicemail, but the Tigers denied that it was Long. Here is audio of Long at a Memphis practice.

There's definitely a chance that the man on the other side of the phone was not Long, but if it was, this is an embarrassing mistake for a coach to make.