Complex sentence: The following season, the team played in two Grand Slam events: they played at the 2013 Canadian Open, finishing with a record of 1-4, and the 2014 National, again earning a 1-4 record.
Split into simpler sentences: The following season, the team played in two Grand Slam events. They played at the 2013 Canadian Open, where they finished with a record of 1-4, and they played at the 2014 National, where again they finished with a 1-4 record.