CREATE TABLE "table1_16857_2" (
  "season" real,
  "mls_reg_season" text,
  "mls_cup_playoffs" text,
  "u_s_open_cup" text,
  "concacaf_champions_cup_champions_league" text
);

Question: What were the placements of the team in regular season when they reached quarterfinals in the U.S. Open Cup but did not qualify for the Concaf Champions Cup?
SQL: SELECT "mls_reg_season" FROM "table1_16857_2" WHERE "u_s_open_cup"='Quarterfinals' AND "concacaf_champions_cup_champions_league"='Did not qualify';

Question: How did the team place when they did not qualify for the Concaf Champions Cup but made it to Round of 16 in the U.S. Open Cup?
SQL: SELECT "mls_cup_playoffs" FROM "table1_16857_2" WHERE "concacaf_champions_cup_champions_league"='Did not qualify' AND "u_s_open_cup"='Round of 16';

Question: When was the first season?
SQL: SELECT MIN("season") FROM "table1_16857_2";