Randy Johnson will have season-ending back surgery and intends to be back for the Diamondbacks at spring training next year. "I have no intention at this time of retiring," he said at a news conference Friday. "I'll cross the bridge of surgery and be willing to go through the process of rehabilitation again because I know I can still pitch. And I love pitching. It's what I've been doing since I was 7 years old." It marks the second year in a row that the Big Unit will have an operation on his troublesome back. It will be the third back operation of his career.