If you watch the replay, the ball actually hit the ground about 2 feet in front of the right fielder. He could have easily caught it, but he saw Shaddy going balls to the wall, heard him call for it and slowed up.
I can't figure out how to embed this video, but of you click on this link, it has a pretty good angle on the play:
http://www.espn.com/watch/player?id=23930843
I was always very aggressive when I played the outfield, any ball I could get to without sliding was mine and I made sure the other fielders knew it. I had a good arm and loved to throw base runners out. Nothing like a running start to get a little extra mustard on the throw. Plus, it's always easier to pick up the ball when it's in front of you than when it's coming over your shoulder.
BNM