NBA star Kobe Bryant, 34, expressed his concern about his torn Achilles on Saturday via Facebook and called his frustration “unbearable.”

On Friday night, Bryant suffered the possibly career-ending injury during the Los Angeles Lakers 118-116 win over the Golden State warriors.

He underwent surgery on Sunday and wrote this post on Facebook beforehand:

“This is such BS! All the training and sacrifice just flew out the window with one step that I’ve done millions of times! The frustration is unbearable. The anger is rage. Why the hell did this happen?!? Makes no damn sense. Now I’m supposed to come back from this and be the same player or better at 35?!? How in the world am I supposed to do that??

I have no clue. Do I have the consistent will to overcome this thing? Maybe I should break out the rocking chair and reminisce on the career that was. Maybe this is how my book ends. Maybe Father Time has defeated me. ... Then again maybe not!” he continued.

“It’s 3:30 a.m., my foot feels like dead weight, my head is spinning from the pain meds, and I’m wide awake. Forgive my venting, but what’s the purpose of social media if I won’t bring it to you real, no image?? Feels good to vent, let it out.

To feel as if this is the worst thing ever! Because after all the venting, a real perspective sets in. There are far greater issues/challenges in the world then a torn Achilles. Stop feeling sorry for yourself, find the silver lining and get to work with the same belief, same drive and same conviction as ever.

"One day, the beginning of a new career journey will commence. Today is not that day.

“If you see me in a fight with a bear, pray for the bear.” I’ve always loved that quote. That’s “mamba mentality” -- we don’t quit, we don’t cower, we don’t run. We endure and conquer.

"I know it’s a long post, but I’m Facebook venting LOL. Maybe now I can actually get some sleep and be excited for surgery tomorrow. First step of a new challenge.

"Guess I will be coach Vino the rest of this season. I have faith in my teammates. They will come thru [sic].

"Thank you for all your prayers and support. Much love always. Mamba out.”

Although there have been questions about whether Bryant should retire soon, if Bryant recovers from this injury and stays in the league, he will be in good company. One of the greatest players in NBA history, Patrick Ewing, did not retire until 2002, after 17 years in the league. He was 40 years old. All-star Reggie Miller was 39 years old when he announced his retirement from the Pacers at the end of the 2004-2005 season.