Complex sentence: The rivalry originated in 2003, starting with verbal bouts between players on the two teams and escalating further following when the Panthers went to Tampa Bay and beat them in what ESPN.com writer Pat Yasinskas described as "one of the most physical contests in recent memory".
Split into simpler sentences: The rivalry originated in 2003 and started with verbal bouts between players on the two teams. It escalated further following when the Panthers went to Tampa Bay and beat them in what ESPN.com writer Pat Yasinskas described as "one of the most physical contests in recent memory".