What happens when a live ball and a dead ball penalty happens on the same play l Example Holding Offense AND Unsportsmanlike conduct Defense?

Answer 1

The live ball penalty is applied first, then the dead ball fouls is applied after the live ball foul.

For example, a holding call on the offense would result in a replay of the down with a 10-yard penalty. If that occured on 2nd-and-five, it would become 2nd-and-15.

Then, the defensive personal foul would be applied; a 15-yard penalty with an automatic first down. If the original line of scrimmage was the offene's own 40-yard-line, the next play would be 1st-and-10 from the offene's 45.