There is one equipment modifier that I can't find. What is it and how do I get it?

Don McMahon

This may sound confusing, The modifiers are Power, Power boost, drivind accuracy, ball striking, Approach, Spin, Putting, Recovery, and Luck. There is one more that I don't know what it is. It is at the bottom of the screen when you got to modify you equipment modifiers, but I can't find it anywhere else.