JJ's definition of a sport
team based = check
more that 2 players per side
physical contact between players = check
low to moderate level of scoring = check
(hockey and soccer low scoring, foot ball moderate, basketball high level of scoring)
players and coaches can get penalties = check
Play on the field is fluid = check
Requires skill, practice and luck to win = check
PS i do not think that baseball is a sport. no penalties and not fluid. Tennis is not a sport, no physical contact. Cross country not a sport, no scoring just measurements (time, distance, etc).