The former Leeds forward has been discussing the defender after Saturday's FA Cup win.
Indeed, the former striker and current pundit believes the 24-year-old did well defensively against Bolton on Saturday afternoon, when United knocked Wanderers out in the fourth round.
But he also praised Wootton's attacking capabilities, suggesting Diagouraga's presence has freed the Leeds man up, allowing him to even be the furthest man forward at times.
Whelan told the BBC after the win: "He had to deal with some real pace today and he dealt with it the best he could.
"What impressed me today was that you saw him in more advanced positions - sometimes he was the furthest man forward.
"It's like the introduction of Diagouraga has given him a bit more freedom and confidence. That's something the management will have wanted from him."
Diagouraga seemed to play the role of magician against Bolton. Indeed, Whelan thinks he gave Wootton freedom and Steve Evans said the exact same thing about 18-year-old playmaker Lewis Cook.
With Liam Bridcutt and the 28-year-old in midfield, Leeds certainly seem to have a solid base. United's task now is to build on this instead of letting their momentum slip - as they have done a few times already in the Championship this season.