Following light acclimation days last Wednesday and Thursday, the Denver Broncos officially kicked off training camp with practices on Friday and Saturday -- without pads. The first four sessions were meaningful, but things will heat up when the pads come on Monday.

Meanwhile, linebacker Drew Sanders was carted off injured, running back RJ Harvey flashed and Denver's defensive depth is standing out.

As Broncos Training Camp powered by Ford officially opens, team reporter Elisa Hernandez and lead writer Aric DiLalla take a look at three key takeaways from Day 1's practice.