Complex sentence: On July 6,2016, the team extended its contract through the 2020--2021 season and made NBC Sports Northwest the exclusive broadcaster of all regional Trail Blazers games beginning in the 2017--18 season.
Split into simpler sentences: On July 6,2016, the Trail Blazers extended its contract through the 2020-2021 season. The extension also made NBC Sports Northwest the exclusive broadcaster of all regional Trail Blazers games beginning in the 2017--18 season.