Clarification about a roll

"Late in the game, one of the defensive options is "guard the line". This will turn some doubles into groundouts."

the 1-6 roll v RHP = Double to LF, so if you're correct wouldn't it be a groundout to 3B instead of 1B, as was indicated?

"Bill, did I ever tell you about a little restaurant in Newark called Gino's? The best cannelloni this side of Rome. Anyway, I was there and who should I see but...line smash by Speaker down the third base line....I don't believe it....what happened, White?....I don't believe it....Holy cow, the ball was headed for two at least and .....Bill, did you see what happened?....it did what?....it bounced off the 3rd base bag and carommed over to the first baseman, Allen....Holy cow, did that ever to you, White?....and don't tell me yes because I wouldn't believe you....well, Gino's has this really great cannelloni and a tiramisu that's....what....that's three outs?....Just as well, I'm getting hungry...."