Question: For which network was Chris Walby the color commentator after 1990?
SQL: SELECT "Network" FROM "2-17628022-3" WHERE "Year" > 1990.0 AND "Colour commentator(s)" = 'Chris Walby';

Question: Who was the pregame host before 1992 when there was a play by play of Bob Irving?
SQL: SELECT "Pregame host" FROM "2-17628022-3" WHERE "Year" < 1992.0 AND "Play-by-play" = 'Bob Irving';