Minnesota Vikings defensive end Everson Griffen was on the wrong side of a taser today -- after the NFLer allegedly assaulted a cop in L.A. -- and it's his second arrest in three days ... TMZ has learned.

Law enforcement sources tell us LAPD pulled over Griffen -- a USC grad -- around 4 PM Monday near the Trojan campus ... and he failed to produce ID.

That's when we're told the 6'3", 275-pounder tried to take off on foot -- and allegedly assaulted an officer in the process.

Sources say cops were forced to take Griffen down with a taser -- and then arrested him on one count of felony battery.