I really like this deal. Robertson will enter the very crowded spring training scrum for right-handed relievers. He has average velocity and a nasty slider - potentially a plus offering. Robertson is a fine athlete who was a second-team All-American as a 3B at Birmingham Southern where he is the career leader in HR, TB and RBI.
In 306 minor league innings, Robertson struck out 383 batters while walking 123. That works out to 11.26 K/9, 3.26 BB/9 and a K/BB of 3.11. His nine big league innings hardly indicate his underlying abilty.