One way is to add a numeric variable for "Home_team_win" or similar with a value of 1 for Win and 0 for Loss. Don't assign when a tie happens.
Proc means on that variable will give the decimal form of the percent of wins .
Proc means data=yourdata;
var Home_team_win;
run;
If you add CLASS variables such as tournament you will get a separate result for each tournament.