Could have everything to do with Pomeranz.
Pomeranz has a 5.95 ERA pitching to Leon. He has a 2.90 with Holoday. Most of his starts have been caught by Holoday. He pitched to Hanigan once and had a good start with ERA in 6 IP.
Winning 16-2 then losing 2-1 is frustrating but it's mostly positive - you just got 2 very well-pitched games in a row. Winning 16-2 then losing 10-9 is much worse.