Under the category of 'sometimes it takes just a few to spoil things', someone threw a beer can that damaged the World Series Championship Trophy as the Duck Boats made their way through the streets of Boston on parade day.

You can clearly see what happened in this video (below)...

Another thrown beer can from the crowd hit manager Alex Cora and several players talked about catching/deflecting flying cans during the rolling rally.

Boston police say they arrested six people for various violations.

Thousands of people lined the streets of Boston to get a glimpse of the 2018 champs.