Tuberville issues apology for block

a. An obviously delayed block at the thigh or below against an opponent (except the runner) who is in contact with a teammate of the blocker, is in the act of disengaging from the first blocker or has just disengaged from the first blocker but is still confronting him. When in question, the contact is at the thigh or below (A.R. 2-3-3-I-V).

b. A high-low, low-high or low-low combination block by two nonadjacent linemen with or without a delay between contacts occurring in the neutral zone.

c. A high-low, low-high or low-low combination block by any two offensive players with or without a delay between contacts when the initial contact clearly occurs beyond the neutral zone (i.e., all involved players are beyond the neutral zone) (A.R. 2-3-3-III and IV).

Source: NCAA rule book