Between 1990-1998, Gonzalez was a slightly below average player and was not putting up the kind of batting numbers expected of a corner outfielder. His best year during that period was , when his batting average was .300, with 162 hits, including 34 doubles and 15 home runs.
The Diamondbacks reached the World Series that year. In the climactic moment, Gonzalez came to the plate in the bottom of the 9th inning of game 7, with the game at a 2-2 tie, the bases loaded and 1 out. The Yankee pitcher was Mariano Rivera, one of the game's most feared closers with an especially good record in the postseason. Gonzalez swung at one of Rivera's pitches and hit a bloop single into left field that won the World Series for Arizona.
He was also selected to All-Star Teams in and . During the 2002 season, Gonzalez received publicity as a piece of gum chewed by Gonzalez during a spring training game was sold for $10,000 on April 15, 2002. The buyer was Curt Mueller, owner of Mueller Sports Medicine Inc., manufacturer of the gum, Quench.
On June 15, 2006, The Arizona Republic printed an interview by columnist E. J. Montini with Diamondback managing general partner Ken Kendrick. In the interview, Kendrick mentioned whispers of alleged steroid use by Gonzalez; in the interview Kendrick never directly accused Gonzalez of using performance enhancing drugs. The interview came 8 days after Diamondback relief pitcher Jason Grimsley was released by the team after the team learned that federal agents had searched his home looking for evidence that he was a distributor of human growth hormone and other performance-enhancing drugs. On June 16, 2006 an angry Gonzalez called a press conference to deny that he had ever used steroids.
On September 14, , the Diamondbacks announced that they would not pick up the team option of $10 million to re-sign Gonzalez after the 2006 season On December 7, Gonzalez signed a two-year contract with the Los Angeles Dodgers for $7 million for the season.
Gonzalez hit his first home run as a Dodger on Sunday, April 8, 2007 versus Barry Zito of the San Francisco Giants. He hit two home runs in that game.
Gonzalez has served as a color commentator on ESPN Radio's broadcasts of National League Division Series games in recent years, and also worked on Fox Sports' television broadcast of the 2006 National League Championship Series.
Gonzalez formerly owned and operated a restaurant called Gonzo's, located in oldtown/downtown Gilbert, Arizona. It then changed name several times, and as of March, 2007, it is called "The Grain Belt".
Gonzalez was also the Celebrity face for a cornfield maze in Queen Creek, AZ for the Schnepf Farms' annual Celebrity Maze. Gonzalez is the first local celebrity featured. Oprah Winfrey, Larry King and Jay Leno were featured in the past.