"You don't really understand an athlete until you're on the bench with the guy every day," Mark said. "It was phenomenal to watch what he could do as a 45-year-old. To me it's still the most amazing thing I'd ever seen; he won the MVP [in 1973-74]. Just to watch what he could do every day and dominate was so impressive, and to be a part of that, it was something I'll never forget.
"I played left wing on his line all the time; there are some people with which you have chemistry and some you don't, and you would think the father-son chemistry wouldn't work. But we had great chemistry. I was 18 years old and what an impact that had on me in helping my game. We won a couple of [WHA Avco World championships]."
Gordie had 174 goals and 508 points in 419 WHA regular-season games, including two seasons with the New England Whalers.
Mark told a story San Jose Sharks general manager Doug Wilson shared with him during an intermission one night against the Red Wings at Joe Louis Arena.
"Doug told me that in his first game against Gordie, my dad accidentally hit him and broke his nose," Mark recalled. "They were fixing him up in the locker room and between periods, Gordie walked around the building and into the [Chicago Blackhawks] locker room and said to him, 'Hey kid, I didn't mean to do that to you.' He introduced himself, and then dad went back and played the game."
Mark said he never heard his father discuss hockey with the family, including his brother Murray and sister Cathy. Mark got all of Gordie's hockey-related stories from former players.