Casey sees Smith's speed vital for Pistons' second unit

(Photo: Clarence Tabb Jr., Detroit News)Ann Arbor — In the week of training camp, the Pistons have worked on coach Dwane Casey’s offensive and defensive systems and gained some comfort with it.

Although there have been questions about Reggie Jackson’s health and whether he’d be ready to start the regular season, he has progressed in his rehabilitation and got medical clearance to participate fully in workouts.

If he’s healthy, it’s clear that Jackson will be the starter, but Ish Smith will be a weapon as the backup. It’s nothing new for Smith, who has been an integral part of the Pistons’ second unit. Because of Jackson’s injuries the past two seasons — which caused him to miss a total of 67…