"Pistons coach Lawrence Frank has emphasized mental toughness — not physical — during tough stretches of the schedule.

Rookie Brandon Knight appeared to be a prime example.

And although he insisted he didn't hit any rookie wall, Knight's lack of aggressiveness in recent games said otherwise.

"My legs always feel good to me," Knight said, in the attempt to shrug off any notion of fatigue. "That's just a mental thing, but your legs might be telling you something different. I try to get rest and treatment.""