CREATE TABLE table_72827 ("Season" FLOAT, "MLS Reg. Season" CLOB, "MLS Cup Playoffs" CLOB, "U.S. Open Cup" CLOB, "CONCACAF Champions Cup / Champions League" CLOB)

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?
SELECT "MLS Reg. Season" FROM table_72827 WHERE "U.S. Open Cup" = 'Quarterfinals' AND "CONCACAF Champions Cup / Champions League" = 'Did not qualify'
SELECT "MLS Reg. Season" FROM "table_72827" WHERE "CONCACAF Champions Cup / Champions League" = 'Did not qualify' AND "U.S. Open Cup" = 'Quarterfinals'