He's been working with other former NFL players for months now doing #TheGRIDIRONGANG. A group of players who work with the younger generation to develop their skills during the offseason. A lot of Colts players are part of it, and Mathis has been working non-stop to help them get better and hone themselves.
Here is a look at what they do.
https://twitter.com/RobertMathis98/s...92903342395398