Even though sacks, TFLs and strips are some of the most game-changing plays a DLineman can make, the DLine at one time or another will be called to take on a puller. Depending on what type of defense a Dlineman is in, he will be asked to either force (secure the D gap) or spill (secure the C gap) the pulling offensive lineman and if you're asked to spill using a wrong arm technique is one of the best ways to do it.