In a Bowling league, the team that has fewer players is given one or more imaginary teammates called a vacancy (or sometimes a blind, though technically this refers to an actual teammate who happens to be absent that day). Then a fair handicap can be calculated, based in part on the score assigned to the vacant player(s).
how do they grade players
It is the sport of Scottish Bowling.
Lawn Bowling is different from the US term "bowling." In lawn bowling, players stand on a green and roll palm sized balls towards a jack or kitty rather than down a lane towards pins such as in tenpin bowling. See related links below.
The name of the bowling league where players play individually is called a singles league.
Of course.
Cricket.
Yes
the bowling league was stratified into "A" players, with high averages, and "B" players, with lower ones.
$1.00
March Madness
In the major leagues, yes, its so you can tell them apart.
enough skills to compete with all the other players