Yoshinori Ohkoso was the founder of NH Foods Ltd., who established the company as the top food manufacturer in a single generation. In 1973 the Nittaku Home Flyers were considering selling the team, and Ohkoso took over, becoming the team's first owner. His own uniform number "100" is the only retired number one on the team. In 2009 he became the only team owner in Japan's professional baseball history to be inducted into the Baseball Hall of Fame.

Serving as the CEO of NH Foods Ltd. from 1996 to 2002, Hiroji Ohkoso led the team's relocation to Hokkaido as a chairman of the baseball team in 2004. He played a key role as the leader in promoting a community-oriented team with strong local roots. He became the team owner in 2005, acting owner in 2012, finally retiring in 2016.

In 1934, Mihara was the first person to sign a pro athlete contract with the Dainippon Tokyo Baseball Club (current day Giants). After retiring, he acted as manager for various teams, becoming the first team president in 1973. In 1981 he won the league championship, and was inducted into the Baseball Hall of Fame in 1983.

Known as the "Juggernaut" since attending Takamatsu Daiichi High School, Nakanishi joined the Nishitetsu Lions in 1952. The following year, he became the youngest player in history to achieve a triple crown. He retired in 1969 and became the first Fighters' manager in 1974. Osamu Mihara, who was the first team president, was his father-in-law.

Osawa joined the Nankai Club in 1956. He transferred to Tokyo (current day Chiba Lotte Marines) in 1965, then retired the following year. In 1976 he became the manager and lead the team to its first league championship in 1981. He is beloved by the fans who call him "Chief Osawa."

Transferred from Nankai in 1976, Kashiwabara thrived on the team well from his first year. He is well known for his bats and fierce playing style. In 1981 he played a pivotal role in helping the Fighters win the league championship. He supported the team in later years by serving as instructor and front office personnel.

Drafted and joined the team in 1986. He played all of his 22 seasons for the Fighters and earned the nickname "Mr. Fighters". He helped the Fighters win the Japan Series in 2006. He retired in 2007 only after becoming the first player ever to collect all of his 2,000 hits as a Fighter.

Shinjo joined the team in 2004 after playing for the Hanshin Tigers and several Major League Clubs. He captivated the fans with his unprecedented performance, demeaner, and grit ever since the team relocated to Hokkaido. He retired in 2006 with unforgettable memory for the fans rather than the numbers on the score book.

Ogasawara joined the team in 1997. His powerful full swing led him to become the number one hitter twice, leading to numerous titles. Ogasawara is one of the rare batters to gain incredible acclaim. As the Pacific League MVP in 2006, he helped the team win the league championships, becoming number one in Japan.

Inaba joined the team in 2005. The following year, he was crowned as the Japan Series MVP with his gritty bat. He was the key person to support the team after is relocation to Hokkaido and garnered a massive support from the fans with a unique cheer known as the "Inaba Jump".

Darvish joined the team as the number one draft pick in 2005. The following year, he became one of the pivotal players with 12 wins as the team won the Japan Series. In 2007 he won the Sawamura Award along with many other titles over his seven years on the team, leaving a lasting impact with some calling him the greatest pitcher in Fighters history.

As an unprecedented two-way player, Ohtani became a true legend during his five years on the team. In 2016, his fourth year with the Fighters, he led the team to win the Japan Series. In 2018 he crossed the pacific to the U.S. where he became a two-time American League MVP and continues to take the world by storm. Ohtani is the best baseball player in the world with its roots in the Fighters.

Hillman became the first foreign Manager of the Fighters in 2003. Team finished 3rd in the league in a year team relocated to Hokkaido but in his third year in Hokkaido, he led the team to first league championship in 25 years as well as winning the Japan Series for the first time in 44 years. The following year, he led the team to its first ever back to back league titles.

Nashida joined Kintetsu Buffaloes in 1972 and known as a great catcher. He was the last manager for the Buffaloes when the team merged with the BlueWave. Became the manager of the Fighters in 2008, winning the league championship in 2009.

Kuriyama became the fighters Manager in 2012 via becoming a TV color commentator after his retirement in 1990. Won the Pacific League Championship in his first year as the manager. Won the second pennant in 2016 as well as winning the Japan Series for the first time in 10 years. He was the longest tenured manager until his resignation in 2021.

Registering his jersey name as "Big Boss," Shinjo became the manager in 2022 after 16 years hiatus from baseball. Leading the team in its final year at the Sapporo Dome. The inaugural year of the ES CON FIELD HOKKAIDO in 2023, he changed his registered jersey name to Tsuyoshi Shinjo to get a fresh start. However, the team finished in last place for the second time in as many years while actively using younger players.