He had only 18 attempts all game. Throwing for 139 yards on only 18 attempts is good. The long pass was the biggest offensive play of the game. He also had several scrambles for nice gains, including converting on third-and-13 to kick start a TD drive.
The fumbles weren't good. Sliding before the first down is him just not realizing where the ball is spotted when you slide (maybe because the officials usually spot it incorrectly, which is why that play was reversed upon review).
Like I said, he was more than efficient enough against Minnesota, he just didn't pile up the fantasy numbers because we didn't throw much.