With Ben Kerner, Ferris founded the Buffalo Bisons, which played in the National Basketball League in 1946. The Bisons evolved into the Tri-Cities Blackhawks, based in Moline, Illinois, which eventually became the Milwaukee Hawks, the St. Louis Hawks, and finally today's Atlanta Hawks. He signed Pop Gates, one of the first two African-American players in the NBL, in 1946. "When Leo Ferris came to me, it was like a godsend," Pop Gates was quoted as saying in the book, "Pioneers of the Hardwood: Indiana and the Birth of Professional Basketball." "It was a real highlight of my career to be accepted by the NBL as one of only two blacks in the league." He later became NBL vice president and president and helped orchestrate its eventual merger with the Basketball Association of America, forming what would become today's NBA. Indiana sportswriter John Whitaker called Ferris the most influential owner in basketball, the “minister, ring bearer, best man” at what Whitaker described as “the shotgun wedding” that created the NBA. The Syracuse Nationals' "recipe for success" began by recruiting Leo F. Ferris, then a talented team executive to reorganize the Syracuse team. Acting in capacity of NBL Vice President and then as general manager of the Nationals, Ferris first moves included signing Dolph Schayes, Al Cervi & Billy Gabor to the roster which put in place the core of the club that took three trips NBA Finals and captured the 1955 NBA title. Concerns about a fan-unfriendly slow pace led to discussion of adding a shot clock to NBA games, adding possessions and excitement. Ferris and Danny Biasone — owner of the Syracuse Nationals, where Ferris was general manager — are often given credit for the selection of 24 seconds, though there is evidence Ferris may deserve the lion's share. Ferris became the first general manager in basketball to organize celebrity halftime shows and brought acts like Bob Hope, Dean Martin, Jerry Lewis, Sarah Vaugh, Duke Ellington, and others to perform in Syracuse. Many of them provided halftime entertainment for the Syracuse Nationals home games. Ferris was successful boosting attendance and expanded the possibilities of the types of entertainment one could enjoy at a basketball game. "Get an attractive ‘package’, and put it within reach of the greatest possible number of customers. Satisfy the fans, and you have a steady, and increasing, following. That's what pro basketball is doing."
Ferris has been nominated four times to the Naismith Basketball Hall of Fame, in 2016, 2017., 2018 & 2019 by the Veterans Committee but is yet to be inducted. Ferris is a member of three regional sports halls of fame: The Greater Syracuse Sports Hall of Fame, Chemung County Sports Hall of Fame, and the Illinois Basketball Coaches Association Hall of Fame. In 2017 The Greater Syracuse Sports Hall of Fame produced an induction video detailing Leo's career highlights. The video was narrated by 'The Voice Of The Orange', Doug Logan.
