Here's the sourcecode for any skeptics; it looks fine to me.

// ==UserScript==
// @name        Fantasy LCS
// @namespace   http://frichter.de
// @include     http://fantasy.*.lolesports.com/*
// @require     http://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js
// @require     https://gist.github.com/raw/2625891/waitForKeyElements.js
// @version     0.3.9
// @grant       GM_addStyle
// ==/UserScript==


function countGames(context, maxGames, isProjected) {
    "use strict";
    /*global $, waitForKeyElements */
    var dotContainer = context.find(".completed"),
        proGames = maxGames;
    if (!(dotContainer.has(".completed-label").length || isProjected)) {
        proGames = dotContainer.find(".complete").length;
    }
    return proGames;
}

function addPlayerPPG(context, maxGames, isProjected, side) {
    var points = context.find(".formatted-points"),
        proPoints = parseFloat(points.attr("data-number")),
        team = context.find(".team-and-position"),
        proGames = countGames(context, maxGames, isProjected),
        proPPG = 0;
    if (proGames > 0) {
        proPPG = proPoints / proGames;
    }
    if (side == "blue") {
        team.prepend('<span>(' + proPPG.toFixed(1) + ' PPG)</span>');
    } else {
        team.append('<span>(' + proPPG.toFixed(1) + ' PPG)</span>');
    }
}

function addPlayerData(context, maxGames, isProjected) {
    "use strict";
    context.find(".fantasy-map-half-red-team").children().each(function () {
        addPlayerPPG($(this), maxGames, isProjected, "red");
    });
    context.find(".fantasy-map-half-blue-team").children().each(function () {
        addPlayerPPG($(this), maxGames, isProjected, "blue");
    });
}

function addGamesPlayed(context, leftGames, rightGames) {
    "use strict";
    var leftName = context.find(".summoner-name" + ".red-team"),
        rightName = context.find(".summoner-name" + ".blue-team");
    leftName.append('<span> (' + leftGames + ' Games played)</span>');
    rightName.prepend('<span>(' + rightGames + ' Games played) </span>');
}

function addMatchPPG(context, leftGames, rightGames, maxGames){
    "use strict";
    var leftHead  = context.find(".fantasy-match-header-item > .points").children("*:first-child"),
        rightHead = context.find(".fantasy-match-header-item > .points").children("*:last-child"),
        leftPoints = leftHead.find(".formatted-points").attr("data-number"),
        rightPoints = rightHead.find(".formatted-points").attr("data-number"),
        leftPPG = 0,
        rightPPG = 0;
    if(leftGames > 0) {
        leftPPG = leftPoints / leftGames;
    } else {
        leftPPG = leftPoints / (maxGames * 7);
    }
    if(rightGames > 0) {
        rightPPG = rightPoints / rightGames;
    } else {
        rightPPG = rightPoints / (maxGames * 7);
    }
    leftHead.prepend('<span style="font-size: 40%;">' + leftPPG.toFixed(1) + '</span>');
    rightHead.append('<span style="font-size: 40%;">' + rightPPG.toFixed(1) + '</span>');
}

function getWeekMaxGames(weekNum) {
    "use strict";
    var weekMaxGames = 2;
    if (weekNum === 1 || weekNum === 7 || weekNum === 11) {
        weekMaxGames = 4;
    }
    return weekMaxGames;
}

function main() {
    "use strict";
    $(".fantasy-match").each(function () {
        var weekNum = parseInt($(this).parent().attr("data-week"), 10),
            weekMaxGames = getWeekMaxGames(weekNum),
            leftGamesPlayed = 0,
            rightGamesPlayed = 0,
            isProjected = $(this).find(".formatted-points").hasClass("formatted-points-projected");

        if (!isProjected) {
            $(this).find(".fantasy-map-half-red-team").children().each(function(){
                leftGamesPlayed += countGames($(this), weekMaxGames, false);
            });
            $(this).find(".fantasy-map-half-blue-team").children().each(function(){
                rightGamesPlayed += countGames($(this), weekMaxGames, false);
            });
        }

        addPlayerData($(this), weekMaxGames, isProjected);
        addGamesPlayed($(this), leftGamesPlayed, rightGamesPlayed);
        addMatchPPG($(this), leftGamesPlayed, rightGamesPlayed, weekMaxGames);
    });
}

waitForKeyElements(".week:first-child", main);