never lost the #1 AP ranking during 1999, produced 20 1st round NFL draft picks (including the 1997 offensive and defensive rookies of the year), won at least ten games every year, and never finished a season ranked lower than fourth in the AP poll. Quarterbacks Charlie Ward and Chris Weinke won Heisman Trophies. The Nebraska Cornhuskers led by head coach Tom Osborne won three national championships in college football in four years (1994, 1995, 1997) Led by head coach Jim Tressel, The Youngstown State Penguins claimed to be the "team of the '90s" by winning four national championships (1991, 1993, 1994, 1997) in division I-AA college football The Ultimate Fighting Championship (1993) and Pride Fighting Championship (1997) debut and evolve into the modern sport of Mixed Martial Arts. Major League Baseball added four teams, Miami Marlins (as Florida Marlins), Colorado Rockies, Tampa Bay Rays (as Tampa Bay Devil Rays), and the Arizona Diamondbacks, and moved one (Milwaukee Brewers) into the National League. The Florida Marlins would win the World Series in 1997 and 2003; the Arizona Diamondbacks would win the World Series in 2001, becoming the fastest expansion team to win a major championship for any major sport; the Colorado Rockies and Tampa Bay Rays would appear in the World Series in 2007 and 2008 respectively. In 1998, Canada wins gold medals for the first time in Disc ultimate at the WFDF World Ultimate Championship in Open, Mixed, and Masters. In the 1996 Summer Olympics, the Women's Gymnastics team won the first team gold medal for the US in Olympic Gymnastics history. In 1997, eight Australian Rugby League Premiership clubs defect to the News Corporation-backed Super League, before a resolution sees the two parties form the National Rugby League in 1998. The British competition is bought out by News Corporation, and renamed Super League, which it is still currently named (although it was sold by News Corporation). Literature Leading talk show host Oprah Winfrey became an important book influencer in 1996 when she launched the highly successful Oprah's Book Club. The hugely successful Harry Potter series by J. K. Rowling was introduced in 1997. The series, with seven main novels, would go on to become the best-selling book series in world history and adapted into a film series in 2001. John Grisham was the bestselling author in the United States in the 1990s, with over 60 million copies sold