I saw that when the SC Finals schedule came out. Since NBC and Versus/NBCSN took over the Finals package, two of the games have been on cable. However, IMO there's NO WAY a potential title clinching game should not be on OTA.
If they insist on two of the games being on cable, it should be games 2 and 3. The opener and games 4,5,6 and 7 should be OTA.
Should that situation arise for game 4, will it be the first major professional sports championship not to be aired OTA?