When I checked the Denver forecast I saw rain starting about 3:00. I assume that's local time, so about an hour after the game starts. Looking at the radar, it doesn't look like a washout storm coming through but definitely an hour or more of rain. I would think/hope they push back the start of the game instead of starting and trying to play through with an inevitable delay. The weather looks worse for tomorrow and it's not like these teams have to travel for tomorrow either, so delaying the start makes the most sense for me.