This seems like it should be a no brainer in favor of Mostert, given his big play ability. However, Mostert recently stated that his ankle is still not 100% and would likely bother him for the rest of the season. Compound that with that fact that he’s up against a good run D in WAS this week, and it gets a bit muddier.
Jamal Williams is my other option, and he plays the worst run D in DET this week. He and Jones have been more of a 1A/1B situation recently (with the exception of last week).