CREATE TABLE table_55420 ("Rd #" FLOAT, "Pick #" FLOAT, "Player" TEXT, "Team  ( League ) " TEXT, "Reg GP" FLOAT, "Pl GP" FLOAT)

Name the least RD number that has PI GP more than 0 and pick # more than 51
SELECT MIN("Rd #") FROM table_55420 WHERE "Pl GP" > '0' AND "Pick #" > '51'
SELECT MIN("Rd #") FROM "table_55420" WHERE "Pick #" > '51' AND "Pl GP" > '0'