John Cabat-Zin, not so much but with the principles and practise of meditation some experience, yes.
It is a real pity this aspect of training in the martial arts has largely disappeared. Training the mind is fundamental, after all that is where our actions come from. Based on good morals, kindness, patience, seeing things clearly, calmness, a martial art can truly thrive as a mind and body unity capable of great benefits to ourselves and those around us.
With the mind aspect neglected or misused MA can becaome something quite awful, or at best just a sport or exercise.