Francis Roy "Minnie" McGiffin, last name sometimes spelt McGiffen, (March 2, 1890 – August 30, 1918) was a Canadian professional ice hockey player.

[2] In a February 17, 1915 regular-season game against the Ottawa Senators, McGiffin became involved in a fight with Art Ross that ended with both players being arrested by Toronto police.

On August 30, 1918, Flight-Lieutenant McGiffin was killed in an airplane crash about a mile and a half northeast of Call Field in Wichita Falls, Texas.

[9] Roy McGiffin was known as a rough player, somewhat in the mold of a modern-day enforcer, and he collected a total amount of 300 penalty minutes over 51 games during his three year long NHA career.

But Jack Marshall, a teammate of McGiffin on the Toronto Blueshirts and a subsequent Hockey Hall of Fame inductee, thought McGiffin's reputation as a violent player was exaggerated and claimed that most of his violent outbursts were for intimidation purposes only: "He's a good little fellow, and wouldn't hurt a fly.