Shaun Wright-Phillips insists he is happy again at QPR after turning down "offers and opportunities" to move in January.
Blackburn goalkeeper Paul Robinson has told Sky Sports he will leave the club this summer and could move abroad.
Whitehead is available on a free transfer after seeing out his contract at Stoke earlier this summer.
A number of Championship clubs are thought to have expressed an interest in the 31-year-old, with the player now weighing up his options.
Mowbray has held talks with former Sunderland captain Whitehead and hopes he can persuade him to move to The Riverside.
"I feel he could help solidify us out of possession," Mowbray told the Evening Gazette.
"Can we do it? I think the boy has got options but he's somebody we've talked to and we'll see what develops over the next few weeks."