Definition of JAG

What does the term "JAG" mean in the world of sports? What is meant by the term "JAG"?

In sports, the term "JAG" breaks down to mean:

Just
Another
Guy

You most certainly don't want to become known as a "JAG" if you play sports, as it means that you aren't special, and are, in fact, "just another guy".

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For instance - let's say that a college quarterback is taken #1 in the NFL Draft.

This quarterback has been hyped to the moon and is expected to turn the franchise around.

After 4 years with the team, the quarterback has put together four unspectacular seasons, and the team has missed the playoffs for four years in a row.

The fan base of the team has said that the quarterback is not special, and is a "JAG".

This is obviously NOT what you want to be if you are a highly touted player.