He's not only not getting reps, they're not even suiting him up. He's been a healthy scratch for 3 games in a row.
I find it very hard to believe that the reason why Penny has been a healthy scratch is football related. You can't tell me that Kenneth Gainwell is a better option than a healthy Penny. Last Sunday vs. the Commanders, Gainwell had -4 yards on two carries, including a fumble inside the 5-yard line.
Gainwell has been struggling throughout the year, having just 153 rushing yards and averaging 3.0 yards per carry in seven games. Of the 41 qualified running backs, Gainwell is 40th in yards per carry. Of the 107 players who have 10-plus carries since Week 4, Gainwell is 96th in yards per carry (2.4).
There has to be something else at work. Penny must really be in somebody's doghouse.
They're probably treating him as an emergency RB, thinking if they play him the injury risk is too high.
Sort of a "break glass in case of emergency" and pray he can hold up for a few playoff games, if needed.