Fine the team $5,000,000 per game with poor field conditions. Each injured player due to said field conditions should double the fine, and cost the team a home game next season. (Three players hurt, that would be $40,000,000 and 11 road games.) Problem solved.
They should just roof the stadiums.
No need to close it in completely just cover the field.
New domed or covered stadiums should be prohibited in the NFL. All new stadiums should be open-air, and retractable roofs on existing stadiums should always be open. There should never be another playoff game in a dome. Either the open-air team gets the home game regardless of seeding, or in the case of two arena-football teams, it goes to a neutral site.
So how would northern teams fare in the 90 degree heat of the South in September?
I can tell you how. How many athletes have died due to cold weather? I can't think of any. Heat? Humidity? It kills some every year. Not "effects their play". It kills them graveyard dead.
So...you must, then, be in favor of requiring all MLB teams to play in climate-controlled domes, then?
I am. Nothing more frustrating than a rain delay. Every team in baseball and football should play under a retractable dome. Football in the snow sucks. All you see is running the football. Can’t even kick FGs.

