German final d doesn't tend to devoice in speech as clearly when the following word begins with a vowel, however, but that's not uncommon with intervocalic consonants being voiced.
As for clear evidence of the different pronunciations of "d" in Spanish in cycling commentary, here's some of the descent from the 2010 Aprica stage on Veo7 - note how the commentators pronounce "David Arroyo".
As for clear evidence of the different pronunciations of "d" in Spanish in cycling commentary, here's some of the descent from the 2010 Aprica stage on Veo7 - note how the commentators pronounce "David Arroyo".