His defense might not be lacking because he can still have the rating of a 25-99 on ball defense sig skills just trigger the effect of a players specialty but doesn't mean he cant still be a beast on defense if he has 99 on ball defensive player you still have to put into an account of all the ratings as well because you can still have 99 steal and pick the ball off but if u have the skill you just get a better percentage of stealing it compared to the guy with just 99 steal