Passan: One hitter makes most sense for a Seattle Mariners trade

Everything seemed to be lining up for a big Seattle Mariners trade before the July 30 MLB deadline, but there's been a big wrench thrown into things. Which Mariners hitter should you buy stock in for second half? Yeah, the Mariners might enter the second half of the season with a slim lead in the AL West, and yeah, they have a clear need (offense) and the ammo (a well-stocked farm system) to address it. Unfortunately, seemingly the entire rest of MLB is in some way still in the postseason race.