It is made up from leaf

Yes. Even though the pitcher did not throw a pitch he was the pitcher of record when the winning runs scored. So he would get credit for the win. Let's say this happened in the 6th inning: A pitcher comes in with the bases loaded, two out, and his team is trailing 6-4. He picks the runner off of first base before he throws a pitch. In the bottom of the 6th the pitcher is pinch hit for and his team scores 4 runs to put his team ahead 8-6. The game ends with a score of 8-7. The pitcher would be credited with the win in this case because, as before, he was the pitcher of record when the go-ahead runs scored. I cannot recall this ever happening but, by rule, a pitcher can be credited with a win without throwing a single pitch.

the big unit

I think you are talking about Chad Bradford. I have to tell he does not pitch of the ground, although his pitching style is unusual. He is a submarine pitcher.

The runner is probably out for interference by running into a fielder, if not, he is out if the throw to first beat the runner and the first baseman, or whom ever is covering first, had his foot on the bag when he received the ball.