When Johnson pitches does opponent LH hitters sit?

[mwb]

This year, when Randy Johnson pitches, does the other team usually sit their LH hitters?

[Edgartohof]

This year, when Randy Johnson pitches, does the other team usually sit their LH hitters?

I'm not sure about every team, but in tonights game, the Phillies only had 1 Left Hander (though they had 3 Switch-Hitters!!!).