A; Because if Luke Babbitt starts, I'm not sure there is a place for Derrick. When you turn to reserves, you turn to someone to do something specific. James Johnson can deliver defense. One more of the guards can let you space the floor with a 3-point guard alignment. And Willie Reed gives you size. So if you go with any power forward other than Derrick Williams behind Babbitt, then you're basically reducing Williams to a 10th-man role, especially with Justise Winslow to get minutes at power forward. That had Tyler Johnson, James Johnson, Reed and Rodney McGruder in as Williams watched Wednesday. And if/when Josh McRoberts gets back, it could put Williams in an even more precarious position. As it is, only two available players against the Magic didn't see action and both are power forwards: Williams and Udonis Haslem.