Has Andre Ward ever knocked an opponent out unconscious?

[Mr Objecitivity]

Or totally incapacitated an opponent, to the point where they couldn't continue standing.

Like the following examples:

https://www.youtube.com/watch?v=rio9TMYUpPk


https://www.youtube.com/watch?v=BbSuQ4REs6g

Please specify and provide some examples if they exist.

['b']

2 actually - Kovalev's right testicle and Kovalev's left testicle