MLB Network posted their schedule of 2018 Spring Training games that they will broadcast, starting on February 23rd and running until March 26th. Below, you will find every game for the Pittsburgh Pirates, along with the starting time. I put asterisks next to the games that are live broadcasts.
As you will notice, only five of the games are live and three of them are home games, which will likely be shown on AT&T SportsNet and blacked out on MLB Network in the local area. If you're out of the local Pittsburgh area and known how to work a DVR (or VCR still?