What if no-one got dropped between now and midway through next season but then someone got injured and Spark got called up? And what if that was a 5 game injury, and after 3 games Spark got dropped for someone else? 10/1 is unders, but it's possible.
Doesn't even have to be a 5 game injury. If Marcuss gets injured for just one game for example then when he gets back Spark will be dropped.