It’s time for the third installment of “Tenacious,” the occasional series about the rehab of safety Tyrann Mathieu as he comes back from his devastating knee injury. (Click here or see below). Mathieu is back on his feet, walking without a limp, so that’s a great sign. He can ride the stationary bike. He mentions he isn’t going to rush anything, but it’s really amazing to see someone progress after how torn up his knee was on that December day.

Best line of the segment: Mathieu is talking about the Biodex machine, the one in which he is strapped into and it basically forces his knee to bend little by little over time until he gets his full range of motion back. As you can imagine, it’s not always a pleasant feeling. (Despite Mathieu facing away from the camera, you can see his body shake and flinch at one point.)

“The Biodex is like my girlfriend,” Mathieu says. “She’s good for me, but she gives me a headache sometimes.”

He chuckled. I’m hoping his girlfriend sees the humor too. But it’s a good segment. Check it out. Another episode is already in the works.