The Mariners have signed their first-rounder, Stetson right-hander Logan Gilbert, for $3,883,800, which comes in at the exact slot value for the number 14 overall pick. The news comes courtesy of MLB.com’s Jim Callis.

Gilbert was ranked as the 16th-best draft prospect by MLB.com and 19th by Baseball America. Though he reportedly touched 97 MPH with his fastball last summer, he sat closer to the 91-93 MPH range this past spring. Scouts have raved about his change-up as well, and many allegedly wish he would throw it more often. He leads the NCAA’s Division I with 163 strikeouts, as Callis notes.

The 21-year-old Gilbert’s 6’5″, 195-pound frame gives him great projectability, along with elite extension. Baseball America also notes that, “He’s shown flashes of above-average breaking balls in the past, but a 60-grade fastball that could be a plus-plus offering with returned velocity is the main selling point for the big righthander.” Gilbert’s alma mater, Stetson University, has produced two of the top starters in today’s game: two-time Cy Young winner Corey Kluber and former NL Rookie of the Year Jacob deGrom.