Complex sentence: As early as the 1994 Grey Cup American owners were calling for numerous changes, led by Jim Speros in Baltimore: 15 yard end zones; no Canadian player quotas; moving the Grey Cup up; and more American teams.
Split into simpler sentences: As early as the 1994 Grey Cup, the American owners, led by Speros, were calling for numerous changes. They wanted the end zones shrunken to 15 yards, no Canadian player quotas; moving the Grey Cup up; and more American teams.