Push to Expand College Football Playoff Stumbles

Fans milling about in downtown Indianapolis ahead of the College Football Playoff national championship game between Georgia and Alabama on Monday night.Credit...AJ Mast for The New York TimesINDIANAPOLIS — The College Football Playoff’s ambitions for expansion stalled on Monday, when the sport’s leading power brokers proved unable to agree on a plan almost seven months after some of them publicly proposed a 12-team format.

The playoff, which currently features four teams each season, could still grow in the coming years and inject hundreds of millions of dollars a year more into the richest conferences in college sports. But the addition of games as soon as the 2024 season is increasingly…