Could be injured, could be losing sharpness due to Gio's reluctness to play the pressing game Stevie G did, Tav always had energy but never had zip, one paced throughout his career but it was the timing of his runs which stood out, but when you constantly have a whole team focused on passing backwards then that's another big part of his game gone.
The reality is as part of player trading he is getting older, he should have been punted and Patterson would have taken his place for a few years to allow Devine time to develop etc.