Complex sentence: He is a line judge and wears uniform number 9, which was also worn by legendary referee Jerry Markbreit from 1976 to 1999, who ironically started in the league as a line judge.
Split into simpler sentences: He is a line judge and wears the uniform number 9. This number was also worn by legendary referee, Jerry Markbreit from 1976 to 1999, who ironically started in the league as a line judge.