Try this
$('.teams').each(function(){
var $this = $(this);
var $team1 = $this.find('p:eq(0)');
var $team2 = $this.find('p:eq(1)');
var $scoresDiv = $this.next('.scores');
var score1 = +$scoresDiv.find('p:eq(0)').text();
var score2 = +$scoresDiv.find('p:eq(1)').text();
if(score1 > score2){
$team1.addClass('winner');
$scoresDiv.find('p:eq(0)').addClass('winner');
}
else if(score2 > score1){
$team2.addClass('winner');
$scoresDiv.find('p:eq(1)').addClass('winner');
}
})
Can be further optimized..