SELECT "MLS Cup Playoffs" FROM table_72828 WHERE "CONCACAF Champions Cup / Champions League" = 'Did not qualify' AND "U.S. Open Cup" = 'Round of 16'
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?
CREATE TABLE table_72828 (
    "Season" real,
    "MLS Reg. Season" text,
    "MLS Cup Playoffs" text,
    "U.S. Open Cup" text,
    "CONCACAF Champions Cup / Champions League" text
)