Complex sentence: O'Brien made his NHL debut against the Los Angeles Kings on October 6,2006, and scored his first NHL goal later that month against Dominik Hašek in a 4-1 win over the Detroit Red Wings on October 18.
Split into simpler sentences: O'Brien made his NHL debut against the Los Angeles Kings on October 6,2006. He scored his first NHL goal later that month against Dominik Hašek in a 4-1 win over the Detroit Red Wings on October 18.