Re: Define "spark off the bench"
There's a difference between "spark off the bench" and "sixth man".
A "Spark" can ignite a teams defense, or offense.
Toney Douglas fits the "spark of the bench role", as he did at times last year.
Omer Asik from the Bulls is a spark off the bench yet hardly scores at all.
Your sixth man on the other hand stabilizes, and orchestrates the second unit.
Ginobili and Terry are excellent examples of such.
Usually a teams sixth man is good enough to start on that squad.