Phil Mickelson Becomes the Oldest Major Winner With US PGA Championship Success

shut my mind: ~에 신경을 끄다
quiet things down: (기분 등을) 진정시키다
I’ve tried to shut my mind to a lot of stuff that was going on around like I wasn’t watching TV,…..,I was trying to quiet things down because I’ll get my thoughts racing.

execute:  실행하다
…but I wasn’t executing the way I believed I could.

breakthrough: 약진, 발전, 돌파구
So, it’s very exciting because I’ve had a few breakthroughs on being able to stay more present.

cherish: 소중히 여기다, 간직하다
fulfillment:성취 
I’ll cherish for my entire life and I don’t know how to describe the feeling of excitement and fulfillment.