Both fighters picked up wins last month, as MacDonald topped Jake Ellenberger and Lawler downed Bobby Voelker.
White, during his post-fight media scrum, mentioned they are looking at putting the two contenders together, and the match could create a new No. 1 contender in the division.
Of course, MacDonald has constantly stated he will not fight UFC welterweight champion Georges St-Pierre, so there is that issue – unless Johny Hendricks downs GSP in November.
MacDonald (15-1) is a training partner and close friend of St-Pierre’s. His only career loss to date was to Carlos Condit.
Lawler, meanwhile, has won two straight since returning to the UFC. He is 21-9 in his career and seems to be revitalized after a move back to welterweight.