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?
Schema: create table table_16857_2 (mls_cup_playoffs varchar, concacaf_champions_cup___champions_league varchar, us_open_cup varchar, PRIMARY KEY (mls_cup_playoffs))
SQL: select mls_cup_playoffs from table_16857_2 where concacaf_champions_cup___champions_league = "did not qualify" and us_open_cup = "round of 16"