You can't get much out of 51 games of defensive data. His DRS over the past 4 seasons are -2, -14, -2 and -10. His UZR ranges from average to bad. His OAA was -2 this season fwiw (11th percentile), -8 the year before (4th percentile) and -4 the year prior (13th percentile).
So he's maybe an average hitter with bad defense and whose baserunning has typically also been quite bad. He and Travis Shaw project to be about as valuable, do you want Travis Shaw as a stop gap for the players you mentioned? I also think you're vastly underestimating how close Groshans and Martin are to the majors. Maikel Franco is barely an average player, we can aim much higher while not breaking the bank.