His collegiate success culminated in being selected first overall in the 2015 National Lacrosse League (NLL) Entry Draft by the Edmonton Rush. Prior to his NLL debut, McIntosh was also the first overall pick in the 2013 Western Lacrosse Association (WLA) draft, beginning his WLA career with the Maple Ridge Burrards. McIntosh immediately made an impact in his NLL rookie season with the Edmonton Rush in 2015, recording 37 goals and 49 assists for a total of 86 points across 18 starts. This stellar performance earned him the prestigious 2015 NLL Rookie of the Year award, receiving seven first-place votes.
His commitment to the Wings was underscored by re-signing a three-year contract, extending his tenure through the 2023-2024 season. Beyond league play, McIntosh was recognized internationally, named to the All-World Team at the 2018 World Lacrosse Championship, and winning the 2019 World Indoor Lacrosse Championship with Team Canada. In addition to his NLL achievements, McIntosh maintains a significant presence across other professional lacrosse leagues. He joined the Archers Lacrosse Club in the Premier Lacrosse League (PLL) in 2019, before moving to the Waterdogs in 2020 through an expansion draft.
His career also includes being drafted by the Denver Outlaws in the 2014 Major League Lacrosse (MLL) Collegiate Draft, and later playing for the Chesapeake Bayhawks. Ben McIntosh is currently a professional lacrosse player for the San Diego Seals, continuing his track record of instrumental roles in championship wins and consistent offensive output.