Welsh has joined Carlisle United on-loan and Preston have signed Brown in a similar deal.
"There's one or two going out with their futures in mind," Brown told the Hull Daily Mail. "Wayne's finding that he's not getting many chances here in the first-team.
"He just wants to play football by his own admission.
"John has found a brick wall in front of him in terms of midfielders and he's just gone out for some first-team football."