The Pirates designated catcher Robinzon Diaz for assignment on Friday, and now according to a team press release he has cleared waivers and been unconditionally released. The 26-year-old catcher hit .279/.307/.357 in 138 plate appearances for the Pirates this year, catching 283 innings.
The press release also notes that recently-designated players Jeff Karstens and Justin Thomas cleared waivers and have been outrighted to Triple A.