As the Pittsburgh Steelers run through training camp with each passing day, it means opportunities are drying up. If unproven players cannot turn things around quickly, they could fail to make the roster when final decisions are made. Making an NFL club as an undrafted rookie is never easy, but it only becomes more difficult when you have established veterans in front of you on the depth chart.
Sebastian Castro was a priority free agent addition for the Steelers after the draft concluded. They liked the safety enough to bring him in with a higher amount than other undrafted free agents commanded.