As he completes his 14th year as a major league manager, the Rockies' Jim Leyland has made it official: This season will be his last.

"I am retiring, absolutely," Leyland said following Colorado's 5-1 win over Montreal yesterday. "I'm ready to do something else in the game and I'm not going to manage any more."

Denver area newspapers reported yesterday that Leyland had announced to his players prior to Monday's series opener his intention to retire at the end of the season.

STADIUM OPENING DELAYED: The construction accident that sent tons of steel toppling on Miller Park and killed three workers will delay the opening of the retractable roof stadium, the Brewers said.

Jon Greenberg, a team spokesman, said no decision has been made about when the new structure will open.

Local news reports said an announcement could be made by the end of the week that April's scheduled opening will be postponed, possibly to mid-season 2000 year and possibly until April 2001.

Robert Trunzo, chairman of the board overseeing construction, issued a statement Tuesday denying that any decision had been made.

WENDELL SIDELINED: Mets reliever Turk Wendell, the losing pitcher in three of his last four appearances, will miss four to seven days with a bruised knuckle on his right middle finger.

EXTRA BASES: Pirates 1B Kevin Young, who has 40 doubles, is the first Pittsburgh player with consecutive 40-double seasons since Hall of Famer Paul Waner from 1927 to '29. . . . The Reds' 21 homers over a five-game span Saturday though Tuesday tied a major league record, according to Elias Sports Bureau. The 1977 Red Sox also had 21 homers over a five-game span. . . . Brewers RHP Hideo Nomo struck out Arizona's Jay Bell in the first inning last night for his 1,000th career strikeout. Nomo reached 1,000 strikeouts in 147 games, third fastest in major league history behind Roger Clemens (143 games) and Dwight Gooden (145).