Ace Reese, the Mariners’ top pick from this year’s draft, stepped onto the field at T-Mobile Park on Monday. The Georgia high school outfielder spent time at Pike Place Market, the Space Needle, and talked with Mariners officials. He also worked through a batting practice on the field. Seattle nabbed Reese four days earlier with the top slot from Walton High School in Marietta. His advisor, Scott Boras, got together with team personnel to map out the club’s draft plans for Reese’s development.