CREATE TABLE table_52725 ("Finished" TEXT, "Post" FLOAT, "Horse" TEXT, "Jockey" TEXT, "Trainer" TEXT, "Odds" FLOAT)

What is the lowest post number for calvin borel?
SELECT MIN("Post") FROM table_52725 WHERE "Jockey" = 'calvin borel'
SELECT MIN("Post") FROM "table_52725" WHERE "Jockey" = 'calvin borel'