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Walter William Weiss (born November 28, 1963 in Tuxedo, New York) is a former shortstop in Major League Baseball who played for the Oakland A's, Florida Marlins, Colorado Rockies, and Atlanta Braves.
Weiss was a member of the 1998 National League All-Star Team. He also won the 1988 MLB Rookie of the Year Award.
Initially drafted by the Baltimore Orioles in the 10th round of the 1982 amateur draft, Weiss decided to put his major league career on hiatus and attended the University of North Carolina. In June 1985, Weiss was the 11th overall pick in the 1985 draft.
At age the age of 23 he made his first major league appearance for Oakland in September 1987. The club was impressed enough with the young shortstop's talent that they traded starter Alfredo Griffin that December ensuring Weiss' would assume a starting job in the 1988 season. Weiss' 1988 season did not seem very impressive offensively as he batted .250 with three home runs, 39 RBIs and 44 runs scored, but the budding shortstop's defensive wizardry helped lead the As to their first American League Pennant since 1974. The 1988 World Series was a rematch of the 1974 matchup with the Los Angeles Dodgers winning the National League Pennant. Weiss made a costly error in Game Four of the matchup that allowed the Dodgers to complete a four game sweep. Following the season Weiss was awarded the American League Rookie of the Year Award, becoming the third consecutive Oakland player to win the award, following Jose Canseco and Mark McGwire respectively.
In 1989 Weiss saw his offensive numbers dip as he battled through injury and adversity. The As again clinched the pennant and met their crosstown rival San Francisco Giants in the 1989 World Series. Although the Series would be overshadowed by the 1989 San Francisco Earthquake which delayed play for three days, Weiss homered and the As swept the Giants to claim their first title in fifteen years.
1990 saw Weiss put up his best offensive numbers to date in hits, runs, and batting average, while stealing nine bases. The A's won their third straight pennant, but Weiss was injured in the 1990 ALCS against the Boston Red Sox and missed the A's1990 World Series loss to the Cincinatti Reds four games to none.
Limited by previous injuries, Weiss did not play much in 1991 and Oakland missed the playoffs for the first time since 1987. In what would be his final year in Oakland, Weiss batted an anemic .212 in 1992 and was traded to the newly formed Florida Marlins during the offseason.
Weiss played in 158 games in 1993 for the Marlins, but following the season he became a free agent and chose to sign with the Colorado Rockies.