if len(homegoals) > 0:  # errors if len is 0
        homegoals.loc[:, 'HomeScore'] = 1
        homegoals.loc[:, 'HomeScore'] = homegoals.HomeScore.cumsum()
        pbpdf = pbpdf.merge(homegoals, how='left', on=['Event', 'Period', 'MinSec', 'Team'])