1999 Arizona Diamondbacks season

The 1999 Arizona Diamondbacks season was the franchise's second season in Major League Baseball and their second season at Bank One Ballpark and in Phoenix, Arizona. They began the season on April 5 at home against the Los Angeles Dodgers, and looked to improve on their 1998 expansion season. They looked to contend in what was a strong National League West. They finished the season with a highly surprising record of 100-62, good enough for the NL West title, becoming the fastest expansion team in MLB history to reach the playoffs. They also set all-time franchise highs in hits (1,566), runs (908), batting average (.277), on-base percentage (.347), and slugging percentage (.459). In the NLDS, however, they fell in four games to the New York Mets on Todd Pratt's infamous home run. Randy Johnson would win the NL Cy Young Award and become the third pitcher to win the Cy Young Award in both leagues.

Offseason

 * October 26, 1998: Izzy Molina was signed as a free agent with the Arizona Diamondbacks.
 * November 10, 1998: Dante Powell was traded by the San Francisco Giants to the Arizona Diamondbacks for Alan Embree.
 * November 13, 1998: Greg Swindell signed as a free agent with the Arizona Diamondbacks.
 * December 2, 1998: Ernie Young was signed as a free agent with the Arizona Diamondbacks.
 * December 10, 1998: Randy Johnson signed as a free agent with the Arizona Diamondbacks.
 * January 22, 1999: Ken Huckaby was signed as a free agent with the Arizona Diamondbacks.
 * February 18, 1999: Dale Sveum was signed as a free agent with the Arizona Diamondbacks.
 * March 30, 1999: Izzy Molina was traded by the Arizona Diamondbacks with Ben Ford to the New York Yankees for Darren Holmes and cash.
 * March 30, 1999: Aaron Small was released by the Arizona Diamondbacks.

Regular season

 * In his first season with the club, Randy Johnson helped the second-year franchise win the NL West title. He joined Gaylord Perry and Pedro Martínez as one of only three pitchers to win Cy Young Awards in both leagues. Johnson led the NL with a 2.48 ERA and led both leagues with 364 strikeouts, 12 complete games and 271$2⁄3$ innings pitched.

Opening Day starters

 * Tony Batista
 * Jay Bell
 * Andy Benes
 * Steve Finley
 * Luis Gonzalez
 * Travis Lee
 * Damian Miller
 * Matt Williams
 * Tony Womack

Notable transactions

 * May 9, 1999: Dale Sveum was released by the Arizona Diamondbacks.
 * June 2, 1999: Lyle Overbay was drafted by the Arizona Diamondbacks in the 18th round of the 1999 amateur draft. Player signed June 8, 1999.
 * June 12, 1999: Dan Plesac was traded by the Toronto Blue Jays to the Arizona Diamondbacks for Tony Batista and John Frascatore.

Batting
''Note: Pos = Position; G = Games played; AB = At bats; H = Hits; HR = Home runs; RBI = Runs batted in; Avg. = Batting average;''

Other batters
''Note: G = Games played; AB = At bats; H = Hits; HR = Home runs; RBI = Runs batted in; Avg. = Batting average''

Starting pitchers
Note: G = Games pitched; IP = Innings pitched; W = Wins; L = Losses; ERA = Earned run average; SO = Strikeouts

Other pitchers
Note: G = Games pitched; IP = Innings pitched; W = Wins; L = Losses; ERA = Earned run average; SO = Strikeouts

Relief pitchers
Note: G = Games pitched; IP = Innings pitched; W = Wins; L = Losses; SV = Saves; ERA = Earned run average; SO = Strikeouts

NLDS
New York wins series, 3-1

Farm system
LEAGUE CHAMPIONS: Missoula