For the Padres, adding Pirela gives them another middle infield candidate who could become a quality bench option (or perhaps even a platoon candidate) in 2016. San Diego's infield is anything but settled at present time, so Pirela should have a better oppotunity for playing time in Southern California than he did in New York.

Pirela was a redundant member of the Yankees organization, since they like Rob Refsnyder more as a possible everyday second baseman (and also have budding shortstop prospect Jorge Mateo waiting in the wings). Therefore, they added a decent pitching prospect in Herrera in exchange for Pirela. Solid move by both clubs.

Pirela is at best a fantasy dark horse but he may see a pretty fair amount of playing time if he wins a job in spring training. Refsnyder should also benefit from this deal, while Herrera is a fantasy long shot.