Stemming across the defensive line is a simple yet effective tactic that new defensive coordinator Andy Avalos will implement in the Oregon Duck defense. In short, stemming is a shift from the defensive line, right before the snap of the ball, used to confuse the offensive line. The better the defense is at recognizing the offense’s snap count, the more effective the tactic is.
Above is a defensive line technique chart that will be a useful reference as we move along. The numbers represent the position of a defensive lineman in relation to the nearest offensive lineman. For example, a 0 technique would be a defensive lineman aligned head up on the center, and a 1 technique would be shading the center to either side of the center.
Stemming actually has multiple benefits. The first of which is to disguise the front that the DL will be in at the snap. The OL will know its assignments based upon how the DL aligns, but those assignments can suddenly change a split second before the play begins when stemming occurs. This puts an immense amount of stress on the OL to adjust on the fly. The moving diagram above illustrates one of Coach Avalos’ most used DL stemming techniques.
Notice how the Stud defensive end is not a part of the shift; he rarely is. In the video above, Boise State aligns in a more traditional front before stemming to more of a Bear look. You can get a real good look at the shift above. The DE stems from a 5 tech to a 4i, the NT from a 2i to a 0, and the DT from a 3 to a 4i. The stem is initiated by a motion call from one of the interior linebackers.
The Ducks will also implement stemming in their third down passing defense. Again, neither stud takes part in the shift, only the two true DL. In the above moving diagram-the nose tackle stems from a 2i to a 0 tech and the defensive tackle stems from a 3 tech to a 5 tech.
I like how this shift could put a significant amount of pressure on the right side of the OL. On top of the stem, the defense is blitzing from the left and the Stud on the right stunts around the defensive tackle to his side. The quick throw by Justin Herbert is probably the only thing that kept him off of the ground on this play.
Another benefit of stemming is that the shift could cause the OL to commit a false start penalty. That’s easy yardage for the defense. I believe this is going to be a really advantageous tactic for the Ducks, and the fact that Coach Joe Salave’a has extensive experience with it from his time at Washington State makes it that much more exciting.
Coach Eric Boles
Newark, Ohio Top Photo Credit: Kevin Cline
Spencer Thomas, the FishDuck.com Volunteer Editor for this article, is an attorney for the Social Security Administration in Atlanta, Georgia, and coaches High School Football for Hillgrove HS in Powder Springs, GA.
Eric Boles was born and raised in Central Ohio, 25 minutes outside of the capital of Columbus. He was raised in a University of Michigan sports household, but at a young age, converted over to the Oregon Ducks. Eric has a degree in Psychology from The Ohio State University, and had started a second degree in Middle Childhood Education. He is also the author of one, soon to be more, children’s book.
Eric had served as an assistant wide receivers coach for the Central Ohio Technical College football program. Now he assists with the football camp provided by his local YMCA’s day camp.
The Comments Below are CLOSED, as we are moving to the OUR BELOVED DUCKS Forum!
Comments below articles are now closed as we have moved all conversation over to the free Our Beloved Ducks Forum. It has been a big success already with many more posts than what we could fit into the comments below articles.
The Our Beloved Ducks Forum is where we we discuss the article above and many more topics, as it is so much easier in a message board format over there. At the free OBD forum we will be posting Oregon Sports article links, the daily Press Releases from the Athletic Department and the news coming out every day.
Be a part of the forum and stay caught up! When you wish to post there, do know that you are protected just as you were on FishDuck. Join us on the free forum right here!
Our 33 rules at the free OBD Forum can be summarized to this: 1) be polite and respectful, 2) keep it clean, and 3) no reference of any kind to politics. Easy-peasy!
OBD Forum members….we got your back. No Trolls Allowed!