The 27-year-old Herrmann will give the Diamondbacks some needed depth behind the plate, although he’s never been able to carry his minor league success over to the Major League level. Herrmann is just a .181/.249/.280 career hitter in 389 plate appearances and batted .146/.214/.272 in 113 trips to the plate this past season. However, he’s a .261/.336/.391 hitter at the Triple-A level. He’s caught 38 percent of opposing base-stealers in his big league career but also comes with below-average marks in pitch-framing.
Palka, 24, hit .280/.352/.532 with 29 homers and 24 steals at Class-A Advanced, though he was a bit old for the level. MLB.com ranked Palka 29th among D-Backs farmhands, praising power as his standout tool but noting that he’ll need to prove he can hit enough to tap into that raw power. MLB.com pegs the 6’2″, 220-pound Palka as more of a first baseman than an outfielder in the long run.