First of all, let's take a look at the table of all National League runs scored this year and how many outs there were in the inning when the runs were scored.
| Total Runs | 3,881 | |
| w/ 0 out | 877 | 23% |
| w/ 1 out | 1,485 | 38% |
| w/ 2 out | 1,519 | 39% |
Here's the Pirates table:
| Total Runs | 183 | |
| w/ 0 out | 38 | 21% |
| w/ 1 out | 62 | 34% |
| w/ 2 out | 83 | 45% |
The Pirates score 45% of their runs with two outs. That's a large amount. Here's the National League leaders in percentage of runs scored with two outs:
| Mets | 49% |
| Pirates | 45% |
| Phillies | 45% |
| Nationals | 42% |
| Astros | 41% |
This isn't all that surprising if you think about it. The Pirates rely on small ball to score runs. If there's one out and you hit a sacrifice fly to score a runner, that counts as a two out run - the Pirates have had a lot of those types of runs. However, the Pirates actually have their best batting average with two outs at .234. This doesn't surprise me either because with two outs in an inning you are always trying to get a hit. If there is less than two outs you may be trying to make out on purpose (sac bunts, directional ground balls, etc.). I'm sure if you did the research you would find that most teams have a better batting average with two outs, but that doesn't take away from the fact that the Pirates have done a decent job with two outs this year.
This team isn't going to be one that mashes the ball and puts runs up in bunches, so it's very important for them to get hits when they have opportunity. They have been doing that recently, and for the year the numbers show that they have done a good job at getting the runs late in innings.