I didn't mean to start a fight, but that photo tells me nothing, either. It's far from 'countervailing' evidence. There's no telling, in this photo, how DiMaggio necessarily came to be in that position. Joe appears to be reaching out for the ball in such a way as to 'confirm' both stories; he could have had to lunge for it at the last second when Mantle went down, or he could have been making a last-second lunge for it after belatedly calling Mantle off when it should have been Mantle's ball.
Again, I have no horse in this race, however that picture is far from convincing evidence one way or another.
Always go to other people's funerals, otherwise they won't come to yours. - Yogi Berra