CREATE TABLE table_20689 ("Year" FLOAT, "Starts" FLOAT, "Wins" FLOAT, "Top 10" FLOAT, "Avg. Start" TEXT, "Avg. Finish" TEXT, "Winnings" TEXT, "Position" TEXT, "Team ( s ) " TEXT)

What is the maximum number of top 10s when he finished in 63rd?
SELECT MAX("Top 10") FROM table_20689 WHERE "Position" = '63rd'
SELECT MAX("Top 10") FROM "table_20689" WHERE "Position" = '63rd'