Kenneth S. "The Rat" Linseman (born August 11, 1958) is a Canadian former professional ice hockey centre who played 15 seasons in the National Hockey League for the Philadelphia Flyers, Edmonton Oilers, Boston Bruins and Toronto Maple Leafs.

Prior to the 1977 WHA draft, Linseman and his agent Art Kaminsky sued the WHA in United States District Court for a league rule preventing teenage players from playing in the league, which the court ruled violated anti-trust laws.

Linseman began the 1978–79 season with the Maine Mariners of the American Hockey League, getting 39 points (17G-22A) in 38 games before getting called up by the Flyers.

The Whalers then swapped Linseman to the Edmonton Oilers with Don Nachbaur for Risto Siltanen and Brent Loney.

He had a great talent for agitating the opposing team to a high level of frustration, leading them to take penalties.

He scored an NHL record three series-clinching goals, since tied by Martin Gélinas of the Calgary Flames in 2004.

After winning the Stanley Cup, Linseman found himself on the move as the Oilers dealt him to the Boston Bruins for Mike Krushelnyski on June 21, 1984.