I can see no logical way a ruptured Achilles could be caused by the turf field.
Simple. If your foot is at an extreme ankle, a grass field will tend to give way somewhat, while artificial turf tends to grip securely. Rogers foot got trapped like on fly-catcher paper. There are many folks talking about injuries like the one last night caused by fake turf.
The players overwhelmingly are pretty passionate about seeing grass fields for all 32 teams.
Aside from the injuries...the rubber pellets on those fields are nasty. On a rainy game like Sunday night in NY you see it clinging to the players hands, arms, face, helmet, to everything. Got into one player's eye and he had to go out for a few plays.