Christopher Kreuzer wrote:I wonder how this compares to families reaching professional level in other sports?
In Formula One, I can only think of Graham Hill and Damon Hill. The former was World Champion in 1962 and 1968. The latter was World Champion in 1996. I can also think of Michael and Ralf Schumacher, who are the only brothers to win Formula One Grands Prix.
In snooker, Joe Davis was 20-times World Champion. His brother Fred was 8-times World Champion. Neither are related to Steve Davis.
In speedway, there were a whole host of Collins brothers in the 1970s and 1980s. I can think of Phil and Les who were good, but Peter was World Champion in 1976. Gordon Kennett was a successful rider in the 1970s, his son Edward now rides but isn't as good as his father. America had Shawn and Kelly Moran, who rode for the national team in World Cups.
Cricket has a whole host of father/son things, though:
Micky & Alec Stewart
Peter & Sean Pollock
Arnie & Ryan Sidebottom
Alan & Mark Butcher
Colin & Chris Cowdrey
Alan & Mark Ealham
Lance & Chris Cairns
Famous brothers include Ian, Greg, and Trevor Chappell.
Ice hockey has Henrik/Daniel Sedin brothers for Sweden and the Vancouver Canucks - they caused a fuss by demanding to play for the same team when they were drafted - and there are two Staal brothers, Eric and Jordan. The former plays for the New York Rangers, the latter for Pittsburgh Penguins.