In a long, heartfelt letter, Jets tackle D’Brickashaw Ferguson bid farewell to the fans and officially announced his retirement on Saturday morning.

“As I considered the words I would say to you, I recognize a simple truth: It just isn’t easy saying goodbye,” Ferguson began his 447-word letter, which his posted to Twitter.

The Freeport native, 32, chose to walk away from the NFL on his own terms after 10 seasons and three Pro Bowl selections.

Though he made headlines last season for his critical comments about the NFL after seeing the movie “Concussion,” Ferguson did not mention health concerns as a factor in his decision. Instead, in his typed letter he mentioned his “ability to compete with the best,” adding: “The difficulty in playing at such a level began to increase.”

Ferguson, the fourth overall pick in 2006, also acknowledged “a desire in myself to pursue other goals in life.”

Here is his letter in its entirety:

“My Fans,

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As I considered the words I would say to you, I recognize a simple truth: It just isn’t easy saying goodbye.

I can still remember what it felt like almost 10 years ago as I walked across the stage at Radio City Music Hall. I was selected fourth overall in the 2006 NFL draft and was overwhelmed with the enormity of such an occasion. The loud cheers and clapping hands still echo in my memories. It was a very special moment for me then, as it is now.

But today we celebrate a different type of moment, one that marks the completion of a journey versus the start of one. Today marks my retirement from the NFL as a professional football player.

I am sure some of you might be pondering: Why now? Well, my goal coming into this league was to become the best player I could be. I never wanted to define myself by the size of a potential contract, but rather by my ability to compete with the best that the game could offer. Though I was successful in accomplishing that feat largely throughout my career, the difficulty in playing at such a level began to increase.

I also recognized a desire in myself to pursue other goals in life, and because there isn’t always a discernible point in professional sports where one must retire, the decision becomes a very personal one that all athletes must decide on their own.

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An NFL career at times mimics life, in that you experience success and failure, you learn the value of hard work, and you also recognize that sometimes, despite your best efforts, it still may take a little luck to achieve your goals.

I am proud of what I have accomplished in this league, but football has also taught me that you can’t do it all alone. Others have sacrificed so much to allow me the opportunity to be where I am today, people who have paved the way before me, people who have invested in my life and willingly worked with me to help me achieve my dreams.

So I would like to thank those people, but I first would like to thank God for keeping me and directing me along this journey. I would like to thank my family, my wife, my daughter, parents and brother, my friends, the NFL, Woody Johnson and the entire New York Jets organization, the University of Virginia, and my Freeport, NY, community. I would like to thank every coach, every teammate, and every fan that has shown me support throughout my career. I sincerely thank you all from the bottom of my heart.

—D’Brickashaw Ferguson”