Gardy in the 9th

Can anyone figure out why gardy had Morneau hold the runner on in the 9th inning?

I still can't figure out why it was done. It was 4-2 with 2 outs and a runner on 1st at the time. So he wasn't the tying runner at the time.

I thought to myself, why are you doing this Gardy? Then realized that the chances of a ball being hit there were pretty slim.

1 minute later, d'oh. A chopper was hit to the right side.

I still don't know if Justin could have made a play on it though.But why hold him on? If you are doing it just to guard the line then just guard the line.