National League West in the context of "San Francisco Giants"

The 2010 San Francisco Giants season marked their 128th year in Major League Baseball, their 53rd year in San Francisco since their move from New York following the 1957 season, and their 11th in AT&T Park. The Giants won the National League West for the first time since the 2003 season and both the NLDS and NLCS for the first time since the 2002 season. They would go on to win the World Series, their first championship since moving to San Francisco in 1958. Giants catcher Buster Posey was awarded the National League Rookie of the Year Award.

On October 7, the Giants played their first playoff game since 2003. In the first game of their NLDS against the Atlanta Braves, Tim Lincecum struck out fourteen in a 1–0 victory over Derek Lowe, setting a franchise postseason strikeout record. On October 11, the Giants won their series against Atlanta, advancing to the National League Championship Series against the Philadelphia Phillies. On October 23, the Giants defeated the Phillies to advance to the World Series where they faced the Texas Rangers. On November 1, the Giants defeated the Rangers in Game 5 to win their first championship since 1954.

The Arizona Diamondbacks (often referred to as the D-backs) are an American professional baseball team based in Phoenix, Arizona. The Diamondbacks compete in Major League Baseball (MLB) as a member club of the National League (NL) West Division. The franchise was established on March 9, 1995 and began play in 1998 as an expansion team. The team plays its home games at Chase Field. Along with the Tampa Bay Rays, the Diamondbacks are one of the newest teams in the MLB and are the youngest team to win a World Series, doing so in only their fourth season of existence in 2001.

After a fifth-place finish in their inaugural season, the Diamondbacks made several off-season acquisitions, including future Hall of Fame pitcher Randy Johnson, who won four consecutive Cy Young Awards in his first four seasons with the team. In 1999, Arizona won 100 games and their first division championship. In 2001, they won the World Series over the three-time defending champion New York Yankees, becoming the fastest expansion team in MLB history to win the World Series and the first and only men's major professional sports team in Arizona to win a championship. 22 years later they won their second NLCS and returned to the World Series, losing to the Texas Rangers.

The Los Angeles Dodgers are an American professional baseball team based in Los Angeles. The Dodgers compete in Major League Baseball (MLB) as a member of the National League (NL) West Division. One of the most successful and storied franchises in MLB, the Dodgers have won nine World Series championships and a record 26 National League pennants. As of 2024, Forbes ranked the Dodgers second in MLB franchise valuation at $5.45 billion. They are the current champions of MLB, having won the World Series for the second straight year.

Founded in 1883 in Brooklyn, New York, the team joined the NL in 1890 as the Brooklyn Bridegrooms and used other names before becoming the Brooklyn Dodgers in 1932. The Dodgers broke the baseball color line in 1947 with the debut of Jackie Robinson, the first African American to play in the Major Leagues since 1884. From the 1940s through the mid-1950s, the Dodgers had a fierce crosstown rivalry with the New York Yankees. The clubs have faced each other in the World Series a record 12 times, with the Dodgers losing the first five matchups before winning the franchise's first title (and only one in Brooklyn) in 1955.

The San Diego Padres are an American professional baseball team based in San Diego. The Padres compete in Major League Baseball (MLB) as a member club of the National League (NL) West Division. The team plays its home games at Petco Park in downtown San Diego. Founded in 1969 as an expansion franchise, the Padres adopted their name from the Pacific Coast League (PCL) team that arrived in San Diego in 1936. The name, Spanish for "fathers", honors the friars of the Franciscan order who founded Mission San Diego de Alcalá in 1769.

In 1976, Randy Jones achieved the first Cy Young Award for the Padres. In the 1980s, Tony Gwynn became a major star, winning eight National League batting titles. Under manager Dick Williams, the Padres clinched their first NL pennant, only to lose to the Detroit Tigers in the 1984 World Series in 5 games. In 1995, Kevin Towers became general manager; under his lead, Ken Caminiti became the first Padres player to win the MVP Award. The Padres achieved their second NL pennant alongside Trevor Hoffman, only to be swept by the New York Yankees in the 1998 World Series.

The Cincinnati Reds are an American professional baseball team based in Cincinnati. The Reds compete in Major League Baseball (MLB) as a member club of the National League (NL) Central Division. They were a charter member of the American Association in 1881 before joining the NL in 1890.

The Reds played in the NL West division from 1969 to 1993, before joining the Central division in 1994. For several years in the 1970s, they were considered the most dominant team in baseball, most notably winning the 1975 and 1976 World Series; the team was colloquially known as the "Big Red Machine" during this time, and it included Hall of Fame members Johnny Bench, Joe Morgan, and Tony Pérez, as well as the controversial Pete Rose, the all-time hits leader in Major League Baseball. Despite their decorated past, the Reds have struggled in recent years, and currently have the longest drought of not winning a playoff series of any MLB team, with their last win coming in 1995. Overall, the Reds have won five World Series championships, nine NL pennants, one AA pennant and 10 division titles. The team plays its home games at Great American Ball Park, which opened in 2003. Bob Castellini has been the CEO of the Reds since 2006. From 1882 to 2025, the Reds' overall win–loss record is 11,017–10,845–139 (a .504 winning percentage).