CREATE TABLE table_1721 ("Player" CLOB, "League" FLOAT, "Scottish Cup" FLOAT, "League Cup" FLOAT, "Challenge Cup" FLOAT, "Total" FLOAT)

Name the total number of league cup for mark roberts
SELECT COUNT("League Cup") FROM table_1721 WHERE "Player" = 'Mark Roberts'
SELECT COUNT("League Cup") FROM "table_1721" WHERE "Player" = 'Mark Roberts'