Are you talking about getting WPIX on the RSN Alt's if you subscribe to the MLB package?
no. Depending on which teams you get as your local RSN's if they are on a RSN ALt you'll get them
Here in MN the Sunday games are on My29 in Minneapolis. The rest of MN gets it on a RSN alt channel
from your previous posts I think you were near Rochester? I checked a Rochester zip and with D* you would get
Yankee Ent. & Sports (YES) (Ch. 631) - HD Available
# New Jersey Nets (HD Available)
# Yankees (HD Available)
Madison Square Garden (Ch. 634) - HD Available
# Buffalo Sabres (HD Available)
# New Jersey Devils (HD Available)
# New York Islanders (HD Available)
# New York Knicks (HD Available)
# New York Rangers (HD Available)
MSG Plus (Ch. 635) - HD Available
# New Jersey Devils (HD Available)
# New York Islanders (HD Available)
# New York Knicks (HD Available)
# New York Rangers (HD Available)
SportsNet New York (Ch. 639) - HD Available
# Mets (HD Available)
The next WPIX game is the 18th...next Sunday is on TBS also. I will have to check the guide closer to the 18th to see what it shows but I have seen Mets games on RSN Alternates before.
edit: just checked the guide and no games are on the alt channels yet that far in the future...usually next week they'll pop in there