Kenny Miller: The striker has been training with Rangers during the MLS close-season

The trio have all been training with their ex-employers during their close-season breaks from their respective MLS outfits.

And with Rangers' transfer ban set to expire in September, McCulloch would like to see Miller, who has already had two separate spells with the club, Boyd and Smith return.

He said in the Daily Record: "Kenny is training with us and he's still contracted to his MLS club. Kris is in, too, as is Stevie.

"The three of them would be good signings for the club.

"It's just a matter of whether or not it's possible and whether the boss feels he could take them back."