The Scotland international joined Villa from Fulham in the summer of 2016 for a transfer fee reported by BBC Sport to be worth £12 million.
Much was expected of the former Rangers and Leeds United striker, but McCormack failed to make a massive impact at Villa Park and was sent out on loan to Nottingham Forest in February 2016 for the remainder of the 2016-17 campaign.
The former Cardiff City man has been linked with no fewer than four Championship clubs. According to TEAMtalk, Sunderland, Reading, Derby County and Hull City all want the striker this summer.
“We’re going to be linked with a lot of players, we’ve been speaking to several players and several agents, seeing if we can get the right deal for many targets that we’ve got, for some who nobody has even mentioned yet,” Grayson told The Shields Gazette when asked about speculation linking Sunderland with McCormack.
“We know it’s an area we need to strengthen, we’ve done it already. Will we have more acquisitions in the top end of the pitch? Probably.”