You may have heard the term threshold be used before in madden. Let me explain to you what it is. Thresholds, are basically "milestones" in stats that make a player play significantly better. For example, the zone coverage threshold is 90, which means 90 zone coverags is a lot better than 89 zone coverage. This also means that 99 zone coverage is almost the same as 90 zone coverage. Below, are the rest of the thresholds for each of the overalls and stats.
NOTE: Stats such as Speed and Throw Power do not have thresholds. Most physical stats do not have thresholds!