"I know the players really feed off of the fans and their energy," Chiefs' general manager Brett Veach added after practice. "So, we're excited to get out there, meet our great fanbase and interact with them. It's just a lot of fun and something that we look forward to."

As far as what happened _on_ the field Sunday morning, here's what you need to know:

1. The rain came but the fans stayed

This is about the time of training camp that the players really get their first test of what the grind in St. Joseph, Missouri is all about.

The veterans already know but the young guys are quickly figuring it out.

Many of the guys are still pretty sore from the conditioning test they had on Thursday, which has only been compounded as they've practiced every day since then. There hasn't been a break and it's about pushing through this first wave that will get them ready for their first preseason game, which is less than 10 days away.