Didi on the Radar?

I saw some reports yesterday that the Phillies are showing interest in former Yankees shortstop Didi Gregorius. I'm really not sure why though.

Didi has only played more than 150 games twice in his 8-year career. Gregorius, current Phillies shortstop Jean Segura, and Cesar Hernandez all have an OPS within 10 points of each other. Didi has a little more power than both Segura and Hernandez and he doesn't strike out too much. He doesn't walk much either. Is he an elite defender? He averages about 10 errors per season and has never won a Gold Glove.

Is it the Yankee Mystique? Maybe Joe Girardi loved him when he managed him in New York. And if the Phils sign him, who gets moved? Does Hernandez got non-tendered? Does Segura get traded? What about the talk of signing free agent third baseman Mike Moustakas? Who plays where?

If you sign Didi and Moose, I guess Kingery goes to second base. If it's only Didi, Kingery goes to third and Segura moves to second.

I'm waiting to hear from Yankee experts to tell me why the Phillies should sign Didi. Because from just looking at the stats, I don't get it.