Growing up in Penetanguishene, Ontario, Brian McReynolds and his twin brother Blair were usually the talk of the town when it came to minor hockey, leading their all-star club to numerous championships at the single-A level.
At the age of 17, McReynolds joined the Penetang Kings of the Ontario Junior C Hockey League, where he scored 36 goals and 70 points in just 34 games. He returned the following year and scored 31 goals and 73 points in 28 games. In 1984-85 he hooked up with the Orillia Travelways of the OJHL where he again displayed his knack for offense and deft puckhandling skills, scoring 40 goals and 94 points in 48 games and helped the club to the Centennial Cup, where he had four goals and nine points in four games.
That summer, in 1985, McReynolds was selected in the sixth round, 112th overall in the NHL Entry Draft by the New York Rangers. However, McReynolds realized the chances of cracking the Rangers' lineup would be difficult. He also wanted to get his education, which made the decision to enroll in university. His choice was Michigan State, always an NCAA powerhouse. He enjoyed three highly successful seasons in a Spartans' uniform. His freshman year was no doubt the best and most memorable from a team standpoint, as the Spartans went on to win the NCAA championship in 1986. Among the other future NHLers on that winning team were; Don McSween, Kevin Miller, Mike Donnelly, Joe Murphy, Danton Cole and goaltender Bob Essensa.
In 1988-89, McReynolds spent the entire season with the Canadian National Team. In 58 games, he contributed five goals and 30 points for Dave King's squad. Although his points production was lower than in the past, scouts took notice of his strong all-round play, which earned him a free-agent contract with the Winnipeg Jets in 1989-90. In nine games with the Jets, McReynolds scored two assists. The balance of his year was spent with the AHL's Moncton Hawks, where he tallied 18 goals and 59 points in 72 games.
On July 9, 1990, he was traded back to the Rangers, the team that originally drafted him. In return, the Jets received Simon Wheeldon. McReynolds played just one game in New York in three years with the organization. While in the minors with Binghamton, he recorded his best year as a pro in 1992-93, scoring 30 goals and 100 points.
McReynolds signed as a free agent with the Los Angeles Kings on July 29, 1993. In 20 games he scored a goal and four points. In a 30-game NHL career, he scored a goal and five points.
McReynolds continued to play pro hockey for another five years, primarily in Germany but also made stops in Sweden and with the Phoenix Roadrunners and Atlanta Knights of the IHL. He retired after the 1998-99 season as a member of the Cologne Sharks of the German Elite League.