Acquiring a pitcher for cash from the Rockies worked out well the last time the Yankees did it. Guess they felt it was worth going back to that well again for this minor move.
Martin is a 28-year-old righty reliever who made his MLB debut in 2014, pitching to a 6.89/3.77/2.90 tripleslash with 14 K in 15.2 IP. He throws fastballs of all kinds and his 4-seamer sits comfortably in the mid-90s, and his primary offspeed pitch is a low-80s curveball. He's listed at 6'8'/215 too, so he's a pretty hyyuuuuuuuge dude.
Germen's time with the Yankees was brief and over before it ever started. He had a very small chance of making a significant impact out of the 'pen this year. Clearly the Yankees felt that Martin was an upgrade over him. His ability to play the piano and long songwriting history may have also factored in. So long, Double-G. We hardly knew ye.