Not sure Malcolm Brown will even make a 53 this year. PFF ranked him 82nd this last year.
Shelton and Guy were both highly ranked. One of those two would be interesting, but Brown might be worse than Akeem Spence.
DI should be a high priority in this year's draft, perhaps even the 1st round.
I have been looking at some of the prospects not expected to be drafted this year and imo I think the Dolphins should avoid any Interior defensive players in free agency other than Henry Anderson.
Still hoping for Dexter Lawrence or Wilkins in the 1st round. Wilkins isn't the great football player some think he is but if they truly want to change the culture, Wilkins is widely believed to be one the highest character, born leader, super intelligent, superior humans to ever hit a NFL draft.
Even the 7th round is probably going to have solid rotational prospects.
Signing Brown would be another grievously stupid move by Grier, but I expect those to continue until even the clown of the NFL,Stephen Ross, can't take it.