The Detroit Pistons clearly made defense a priority in the draft when they selected Ausar Thompson with the 5th pick and then traded up to get Marcus Sasser, who is also a good defender.
Detroit had the worst defensive rating in franchise history last season, so obviously getting back to playing Pistons-style basketball will be necessary if they want to enjoy the success of past teams for whom defense was a calling card.
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Adding Thompson will help, but Detroit still has some objectively bad defenders on the roster, including Bojan Bogdanovic and Joe Harris, so may look to add another defender to fill their final roster spot.