I don't think any ...

I don't think any professional accepts defeat.
 Mariano Rivera

Quotes from the same author

I get over bad games right away. Sometimes I've let it go even before I've left the mound. That quick. Why? Because it's over. What can you do about it? Nothing. The only thing you can do is fight if you're still in the game. After that you can do nothing.
 Mariano Rivera
I learned early in my life that sometimes I'm going to lose. I don't like it, but I accept it, meaning that I understand it's going to happen. But I don't see it like defeat; I see it like a learning process. Then if there's nothing to learn, I move on.
 Mariano Rivera
Ever since I was a little kid, I was competitive.
 Mariano Rivera
I see the hitter when he's moved in the box, like when he's moved closer to the plate or changed his stance. I see when the batter has moved his feet, and then I make my own adjustment.
 Mariano Rivera
I'm human -- all I do is try to do my job. When I don't do it, the way it happened today, it's out of my control. He put the ball in play and it happened to find a hole. I wish I could take it back, but I can't. You move on.
 Mariano Rivera