Defining "tough" in hockey can be subjective. It could mean a willingness to fight, a relentless physical presence, or an unmatched work ethic and competitiveness. Since 1990, the Toronto Maple Leafs have seen their share of players who embodied these qualities. Here are three of the toughest:

1. Tie Domi: When discussing toughness and the Maple Leafs, Tie Domi's name is usually at the forefront. Domi was an enforcer in the truest sense. His primary role was to protect his teammates and shift momentum through physical play, most notably fighting. He wasn't the biggest guy, but he possessed a fearless attitude and a willingness to drop the gloves with anyone. He played for the Leafs from 1994 to 2006, amassing a franchise-record 2,265 penalty minutes. Beyond the fighting, Domi was a skilled agitator, known for getting under his opponent's skin. While his offensive contributions weren't massive (84 goals, 196 points), his toughness and willingness to stand up for his teammates made him a fan favorite and a valuable asset during his time in Toronto.

2. Wendel Clark: Wendel Clark is a player who encapsulates toughness in all facets of the game. Clark played for the Leafs from 1985-1994, again from 1996-1999, and a final season in 1999-2000. He was known for his aggressive style, hard-hitting, and willingness to fight. Clark was drafted as a defenseman but transitioned to a high-scoring forward who was a feared opponent. He was named captain in the early 1990s. Clark's toughness wasn't just about fighting; it was about his relentless energy, his willingness to battle for every puck, and his fearless approach to the game. He totaled over 1,500 penalty minutes during his Maple Leafs career. His offensive output was significant, too, scoring 260 goals and 441 points in 608 games with the franchise.

3. Doug Gilmour: Doug Gilmour brought a different kind of toughness to the Maple Leafs. While not primarily known for fighting, Gilmour was one of the most competitive players to wear the Maple Leaf. His work ethic was unmatched, and he never backed down from a challenge. Gilmour was acquired by the Leafs in 1991 and quickly became the team's offensive leader. In the 1992-93 season, he had a remarkable 127 points and won the Selke Trophy as the league's best defensive forward, showcasing his two-way prowess. He followed that up with 111 points in 1993-94. Gilmour's toughness was about his determination, his skill, and his ability to perform at a high level even in the most challenging situations. He wore the "C" during the lockout-shortened 1995 season and was the best player on Leafs teams that made deep playoff runs.

While other players like Darcy Tucker and Gary Roberts could be considered, Domi, Clark, and Gilmour represent different facets of toughness that resonated with Maple Leafs fans and contributed to their teams' identities since 1990.