Yamaha's statement, in which it was also revealed Japan Superbike ace Kohta Nozane would partner Garrett Gerloff at its junior outfit GRT, made no mention of Baz or Ten Kate.
Speaking during last weekend's Estoril season finale, Baz suggested that his hopes of staying on with Ten Kate for a second full campaign next year are becoming more remote.
"More far every day," said Baz when asked if he was any closer to signing a 2021 deal. "It’s not in my hands. Some people promised me a lot of things, we’ll see if it finally happens.
"I said from the beginning, [moving to the] factory team was something I considered, but also I always said staying at Ten Kate could be really important for me and I think we can be stronger with the factory support, factory bike, the same package.
"That is what they promised me but at the moment it’s not sure this will happen."
Asked if it was a Yamaha decision, Baz responded: "At the moment it’s more a question of if the team will be on the grid, I think. We will see.
"Luckily I have other opportunities to ride another strong bike. We need to decide soon. But it’s frustrating because I think I’ve done a strong job since I came here. The job is not finished, for sure there is more potential and we can still improve. But it’s like this."