What It Means:

It was Guerra's third start since returning from shoulder inflammation on September 2, and he looked good, striking out five while allowing only three hits.

While Guerra's 2.81 ERA this season looks great, he is sporting a much less encouraging 4.42 SIERA, and has a 20.3 percent strikeout rate and 8.7 percent walk rate through 121 2/3 innings pitched on the year.