Yes.
In fact, last year, Sean Marshall was pitching for the Cubs and he got an out. Lou stuck him out in LF for one hitter when he brought in a right hander... and then after the pitcher got the out, he brought Marshall back in to get the next out.
Hell, in college... there's been a pitcher that picked up a win and a save in the same game. In between, he went to 1B for a couple innings.