Swansea have been tracking the former England Under-21 international all summer and had an offer, believed to be in the region of £1.75million, accepted by the Teesside club on Tuesday. But Lita still has to discuss personal terms with the south Wales club.
"We have agreed a fee for Leroy with Swansea, but that doesn't mean much in the modern day," Mowbray told Boro's official club website, mfc.co.uk.
"When deals happen close together there are lots of things which enter the equation. It's the clubs, the player and a multitude of agents, so we will wait and see.
"I've had a good chat with Leroy, if he does the deal then I wish him well. He has the chance to play in the Premier League and good on him. His talent has earned him that chance.
"If he comes back here then I'm sure he will get his head down and work hard to get in this team and make an impact on our season."
Source: PA
Source: PA