league = {'Phillies': [662, 476], 'Braves': [610, 550], 'Mets': [656, 687]}

total_runs_scored = 0
total_runs_allowed = 0
for team, scores in league.iteritems():
    total_runs_scored += float(scores[0])
    total_runs_allowed += float(scores[1])
team_removed_runs = {}
for team, scores in league.iteritems():
    team_removed_runs[team] = [total_runs_scored - scores[0], total_runs_allowed - scores[1]]