Poll
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8%
15%
He would have done it to Obi-Wan, then, in ANH.
As we nevewr see grip used on other Jedi in duels, it must be because it;s not a good idea- maybe it;s not fast enough, maybe Jedi are resistant to it... maybe they can directly fight it with the Force. I don't know.
But my point about Obi-Wan beating him while in Ankin form is that he still lost a duel, even while at the height of his powers. Now, there may be many factors that go into that, but the point is that while crippled he is very unlikely to be able to fair well at ALL against a full-powered prequel era opponent.