refactor1

function() {
    if (single) {
        some stats distribution;
    } else {
        some stats distribution;
    }
    if (infield single) {
        some stats distribution;
        return;
    }

    if (runnersAmount == 1) {
        if (isBase1Runner) {
            if (single) {
                some code here;
            } else {
                some code here;
            }
        } else if (isBase2Runner) {
            if (single) {
                some code here;
            } else {
                some code here;
            }
        } else if (isBase3Runner) {
            if (single) {
                some code here;
            } else {
                some code here;
            }
        }
    } else if (runnersAmount == 2) {
        if (isBase1Runner && isBase2Runner) {
            if (single) {
                some code here;
            } else {
                some code here;
            }
        } else if (isBase1Runner && isBase3Runner) {
            if (single) {
                some code here;
            } else {
                some code here;
            }
        } else if (isBase2Runner && isBase3Runner) {
            if (single) {
                some code here;
            } else {
                some code here;
            }
        }
    } else if (runnersAmount == 3) {
        if (single) {
            some code here;
        } else {
            some code here;
        }
    }
}