The SmartTurf blog visited Marlins Park last year. At that time only the infield and the foul areas consisted of paspalum. The outfield was 419 bermudagrass. In February of this year, the outfield was converted to paspalum.
HERE is an article about the conversion from Joelle Harms in Athletic Turf Magazine.
Go to j-dturf.com to learn more about J&D Turf.