CREATE TABLE table_73684 ("Season" FLOAT, "MLS Regular Season" TEXT, "MLS Cup Playoffs" TEXT, "Lamar Hunt U.S. Open Cup" TEXT, "CONCACAF Champions Cup / CONCACAF Champions League" TEXT)

What was the mls cup playoffs when concacaf champions cup / concacaf champions league was quarter-finals (09-10)?
SELECT "MLS Cup Playoffs" FROM table_73684 WHERE "CONCACAF Champions Cup / CONCACAF Champions League" = 'Quarter-Finals (09-10)'
SELECT "MLS Cup Playoffs" FROM "table_73684" WHERE "CONCACAF Champions Cup / CONCACAF Champions League" = 'Quarter-Finals (09-10)'