Toronto FC Front Office
Reports have put the transfer fee as high as $11 million with Alejandro Pozuelo.
Jozy Altidore's current deal is set to expire at the end of this season.
Giovinco said he would have taken less money to stay at Toronto FC.
Porter and Bezbatchenko have each won an MLS Cup.
Jozy Altidore, 28, joined Toronto before the 2015 season.