Sodo Mojo’s Top 40 Seattle Mariners Prospects: 35-31
Art Warren has a big arm. Perhaps the biggest in the organization. He sits comfortably at 95 MPH and can hit up to 100 MPH on certain nights. He backs it up with 2 quality breaking balls, both receiving 55-grades at minimum.
Warren got his cup of coffee in September and flashed legitimate back-end stuff for Seattle. But like so many flamethrowing relievers, Warren needs to throw more strikes, both in volume and quality, or he may end up like Dan Altavilla.
If Warren had 50-grade command, he would be a closer candidate. But that, combined with a series of shoulder ailments leaves Warren with too many questions to rank higher. He has big-time stuff and I wouldn’t bet against him figuring out his control issues, but based on what we know right now, it is tough to project much improvement.