Every off-season, the Pirates sign a few minor league catchers, and there are always comments wondering where those guys will play, and how many catchers the team actually needs. Somehow, I don't think those questions will exist after the 2016 season.
The Pirates haven't been strangers to needing an extreme amount of catching depth. They went through eight different catchers in an injury plagued year in 2011. They have been fortunate since then, which is a bit of a surprise since they mostly relied on previously injury prone guys like Russell Martin, Francisco Cervelli, and Chris Stewart.
The 2016 season ended up being a repeat of the 2011 season.