Kickball is a sport that only has 5 players on each team.
a 4 on 4 game of basketball
Volleyball can have 7 people on each side...... 3 in front 4 in back or the other ways around....
11 players each side.
Two sports come to mind that require two players on each side. One is two player Beach Volley Ball and the other is Doubles in Tennis.
There are 6 players on each side of the net.
Soccer and lacrosse
Thirteen on each side
There are 7 players on each team.
There are 11 players on each side.
Five players from each team.