Jackson, 31, appeared poised for a middle-inning role after a dominant 2015 season for San Diego’s AAA-affiliate, but opted instead to pitch in Japan. He excelled there, too, posting back-to-back seasons of sub 2.03 ERAs for the Hiroshima Carp of Japan’s Central League.
In 35 2/3 innings for San Antonio this year, Jackson’s offered up a commanding 1.01 ERA/1.66 FIP on the back of unassailable peripherals marks: a 12.62 K/9 against just 2.02 BB/9, and not a single homer allowed in a league that’s seen its homer rate jump by as astounding 50.5% this season. The righty should insert himself into a high-leverage role straight away for a team that’s been surprisingly short on reliable late-inning options in ’19. Josh Hader has again been dominant, if homer-prone, but the rest of the club’s complement of ’pen arms – aside from perhaps Jeremy Jeffress – have been mediocre-to-shaky thus far in the campaign.
Dubon, acquired with Travis Shaw in the lopsided deal that sent reliever Tyler Thornburg to Boston, missed much of last season with a torn ACL. He’s rebounded nicely in ’19, though a .307/.343/.491 slash is good for only a 100 wRC+ in the unhinged offensive environment of the PCL.