Complex sentence: Despite his bad Super Bowl performance, the Panthers staff stated that they felt Remmers would be able to grow from his mistakes and reminded that prior to that one match they had just went an entire season 17-1 with him.
Split into simpler sentences: Despite his bad Super Bowl performance, the Panthers staff backed Remmers up and stated that they felt he would be able to grow and learn from his mistakes. They also reminded that prior to the Super Bowl they had just went an entire season 17-1 with him.