The Seattle Mariners reportedly added some pitching depth Wednesday.
According to Jon Morosi of MLB Network, the San Francisco Giants traded right-handed pitcher Chris Heston to Seattle. Chris Cotillo of SB Nation confirmed the trade through a source but added the return package was unknown.
Alex Pavlovic of CSN Bay Area noted the Giants were looking to clear space on their 40-man roster for recently signed closer Mark Melancon. Pavlovic added that "at least a couple of teams had reached out" to San Francisco to see if Heston was available, with the free-agency market lacking impact starters.