I'm seeing Pedroia worth $19 and Gattis worth at most $9 (before Astros announced he will play only a little more than the typical backup catcher). Splitting the difference gives us $14 cash, and even so I'm gambling that an Astro gets hurt and gives Gattis some playing time. Add $2 for Wieters, who has decent upside at that price point and gives you a solid backup with lots of playing time.