It is not uncommon for a Strength and Conditioning Coach to work across sports. A coach I was speaking to recently changed how he behaved based on the sport.
Poorly behaved rugby players did laps while football players got a telling-off.
What do you coach: The sport, the player, or the culture?
Of course, we coach within the culture we find ourselves. The average rugby player runs 6-7 km in a match, while the average footballer runs 10-11km. Regardless, a 14-year remains a 14-year whatever jersey they wear.