the following is a list of 2003 seattle mariners draft picks. the mariners took part in both the rule 4 draft (june amateur draft) and the rule 5 draft. the mariners made 53 selections in the 2003 draft, the first being shortstop adam jones in the first round. in all, the mariners selected 30 pitchers, 8 outfielders, 6 catchers, 4 shortstops, 4 third basemen, and 1 first baseman.