Was at the FedEx at TPC Boston yesterday. On the short par 4, 4th about 300 yards, there is a bunker to the left of the green that many, many players go in. Luke
Donald is in it. After the caddy rakes it, he carelessly throws the rake onto the fairway fronting the trap. Then decides he better move it and haphazardly leaves it right in front of the trap. An obvious accident waiting to happen. Sure enough Garcia is next on the tee, hits the rack and ball settles in the rough.
Have been to numerous pro events and never before even noticed where a caddy left the rake. I suspect at least on this hole, it is put in the rough to the side of the bunker where it would never keep a ball from rolling in.