Well just on a different player. Scott Hatteberg will dawn #21 for the reds this year. Here's a list on other noteable jersey #'s per Marcs blog:

Here are some new-guy uniform numbers, in case you're interested:
# Rick White, 00
# Bench coach Bucky Dent, 7
# Frank Menechino, 16
# Quinton McCracken, 30
# Grant Balfour, 36
# Michael Gosling, 48
# Dave Williams, 52
# Mike Burns, 53
# Justin Germano, 57
# Homer Bailey, 74
# Tuffy Rhodes, 83