For 99 people out of 100, yes. All live NHL, NBA, pre-season NFL, WNBA, MLS, and some live college footbal and basketball (those game included in Full Court or Game Plan), and all in-season live and tape MLB are blacked out on distant RSNs. The Sports Pack will bring you some extra college sports and reruns of the above mentioned games, pre- and post game shows and such ONLY. It will not bring you extra live pro sports.
The only exception has to do with rural people in areas claimed by multiple teams. For example, I get the Ohio RSNs (Reds, Blue Jackets, Indians) in the basic package, but the Sports Pack gets me the Pittsburgh RSN as well, with the Pirates and Penguins. This situation only applies to a very few people.