Hightower and others were in good position to lay Lockette out before he got to the end zone.
That said, Butler was certainly in place to keep Lockette from getting in the end zone, and perhaps holding onto the ball. As it was, the bump on the way to get the ball stopped Lockette cold, and caused him to rotate in the air.
Just watched it again. I was wrong. Hightower would’ve been too late.