ACTIVITY FEED › FORUMS › Defense › 3-4/4-2 Fusion Defense System Forum › Stem › Reply To: Stem Nate Moore Member April 22, 2021 at 5:22 am Coach! Thanks for the question! We do a little of this. Verses a team that is primarily 21 personnel where we want to give them a couple different looks instead of just sitting in our under front we will play some over and also do some stemming between under and over. Hope that helps!