Somehow this deteriorated into a debate about whether Hauser is a 2/3, a 3, a 3/4 or whatever. I am willing to say he is primarily a 3. Not willing to say he is a PF.
But the point in relation to Walker is that Walker is a guard and there are not going to be very many minutes available with Holiday, White, Pritchard, and Springer all returning. That is who I see Walker potentially competing with for minutes.
If you look at the minutes for those 4 last season, adjusting Springer's some to account for him being here all season, it totals 6,859 total minutes or about 84 minutes per game. That means there would be 36 minutes per game when 2 of these guys are on the floor, and 12 minutes when only 1 of them are. Even if Walker were to take all of Springer's minutes, there aren't that many for him, and it would be kind of a waste.
That is why I say that Walker doesn't just have to beat our Springer for minutes, he probably needs to be taking minutes from Pritchard too, if he is going to have a regular rotation role. Maybe they try to give him minutes as a wing, but then he is competing with Tatum, Brown, and Hauser. If he doesn't have a regular rotation role, he is insurance. I am not sure that the Celtics will be willing to pay the tax for him to be insurance.