LONDON (AP) — Nick Pappas rattles off the types of field surfaces at international stadiums the way a quarterback calls plays in the huddle.

Carpet hybrid ryegrass at Croke Park in Dublin. Stitched hybrid bluegrass at Olympiastadion in Berlin. Stitched hybrid ryegrass at Santiago Bernabeu in Madrid. Those three are the new host cities this season on the NFL’s busy international calendar.

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