Brown played minor ice hockey in St. Louis and Indiana where his father, former NHL All-Star Jeff Brown, was coaching. He participated in the 2010 and 2011 Quebec International Pee-Wee Hockey Tournaments with his St. Louis team.
Brown was selected by the Niagara IceDogs of the OHL in the first round in the 2014 OHL Priority Selection. However, he was traded to the Windsor Spitfires for six draft picks.
Windsor Spitfires
Brown skated at the NTDP Evaluation Camp, but ultimately decided to play in the Ontario Hockey League for the 2014–15 season. Brown appeared in his first game with the Windsor Spitfires on September 28, 2014, scoring a goal against Justin Nichols of the Guelph Storm in a 2–1 loss. On October 9, Brown registered his first multi-point game in the OHL, recording two assists in a 5–4 win over the Peterborough Petes. On January 4, Brown recorded his first multi-goal game, scoring twice in a 5–4 victory over the Mississauga Steelheads. Overall, Brown finished his rookie season with 17 goals and 43 points in 56 games, however, the rebuilding Spitfires finished in last place in the Western Conference and failed to qualify for the playoffs. During the 2015–16 season, Brown set a career high with four points in a game, scoring a goal and earning three assists in a 5–3 win over the Flint Firebirds on January 21, 2016. Brown would record another four point game later in the season, again scoring a goal and adding three assists in a 6–4 win over the Kitchener Rangers on March 17. On February 28, Brown recorded the first hat-trick of his career, scoring three goals against Brandon Halverson of the Sault Ste. Marie Greyhounds in a 4–3 victory. Brown finished the season with 74 points, the second highest total on the team, as he scored 21 goals and added 53 assists in 59 games. Brown appeared in his first OHL playoff game on March 24, 2016, earning an assist in a 6–5 overtime loss to the Kitchener Rangers. In the fourth game of the series, with the Spitfires facing elimination, Brown recorded four assists in a 5–4 overtime win. Overall, Brown earned six points, all assists, in five playoff games. Injuries plagued Brown's season in 2016–17, as he appeared in only 35 games, scoring 14 goals and 40 points. Brown did earn two hat-tricks during the season, the first one on October 13, 2016, scoring three goals against Connor Hicks of the Flint Firebirds in a 7–2 victory. His second hat-trick came on January 19 against the Ottawa 67's in a 4–0 victory. In the playoffs, Brown earned four assists in seven games as the Spitfires lost to the London Knights in the first round of the playoffs. The Spitfires hosted the 2017 Memorial Cup, and Brown made his debut on May 19, being held off the score sheet in a 3–2 win over the Saint John Sea Dogs. In his second game, Brown scored his first Memorial Cup goal against Carl Stankowski of the Seattle Thunderbirds, and added two assists, in a 7–1 victory. In the Memorial Cup final, Brown earned two assists in a 4–3 victory over the Erie Otters. After making the team out of training camp and beginning the 2017–18 season in the NHL with Ottawa, Brown returned to the Spitfires at the end of October. On October 27, in his second game back with the club, Brown recorded two goals and four points in a 7–2 win over the Sudbury Wolves. On November 11, Brown scored a hat-trick and added an assist in a 6–5 victory over the Kitchener Rangers. In January 2018, Brown was traded to the Kitchener Rangers along with Austin McEneny in exchange for Grayson Ladd and a package of four draft picks. In 15 games with Windsor, Brown scored 13 goals and 24 points.
Kitchener Rangers
Brown played his first game with the Kitchener Rangers on January 26, 2018, earning three assists in a 6–2 win over the Saginaw Spirit. The next day, on January 27, Brown scored his first two goals with the Rangers against Garrett Forrest on the Flint Firebirds, and added an assist in a 5–3 victory. In his third game with Kitchener, on February 2, Brown recorded four assists in a 4–3 win over the Hamilton Bulldogs. On February 27, Brown earned another four point night, scoring two goals and two assists in a 6–3 win over the Sarnia Sting. In 17 games with the Rangers, Brown scored nine goals and 24 points, helping lead the club to their first division title since 2008. On March 23, in his playoff debut with Kitchener, Brown earned an assist in a 7–2 victory over the Guelph Storm. In game four of the series, Brown earned three assists in a 6–4 loss to Guelph. In game six, Brown scored his first two OHL playoff goals against Anthony Popovich of the Storm, and added an assist in a 5–2 series clinching win. Overall, in 19 playoff games, Brown scored five goals and 27 points, as Kitchener lost to the Sault Ste. Marie Greyhounds in the Western Conference finals.
Professional
Ottawa Senators
On August 19, 2016, Brown signed a three-year, entry-level contract with the Ottawa Senators. Brown made his NHL debut with the Senators on October 5, 2017, against the Washington Capitals. He recorded his first NHL point, an assist, on October 21, 2017, in a game against the Toronto Maple Leafs. Brown was returned to Windsor later in the month having posted 1 assist in 4 games with the Senators. After attending the 2018 training camp with the Senators, Brown was assigned to the team's farm team in the American Hockey League, the Belleville Senators. Brown spent almost all of the season with Belleville except for two games with Ottawa, in which he did not score a point.
International play
While Brown played for Canada at the World U-17 Hockey Challenge in 2014, he chose to play with the USA for the 2016 IIHF World U18 Championships with four of his other St. Louis friends he grew up playing hockey with. Accordingly, Brown will play international hockey with Team USA for the remainder of his career.
Personal life
Brown was born in Raleigh, North Carolina to Canadian parents, and thus he possesses dual American/Canadian citizenship. His father, Jeff Brown, was a member of the Carolina Hurricanes at the time and the family were residing in the Raleigh area. Jeff played over 700 games in the NHL for seven different teams and was selected to participate in the 43rd National Hockey League All-Star Game in 1992.
