Chris Chrisman has some excellent commentary on Jordan Lyles' strong start over on his blog, Checkswing Roller. A snippet:"The received wisdom of the Rockies’ front office, pitching coaches, players, fans, writers, and hot dog vendors is that Colorado pitchers thrive when they keep the ball on the ground, and wilt when they don’t.
Whether this is a phenomenon peculiar to the Rockies is debatable. But what’s not debatable is that Jordan Lyles has a 56.3% groundball rate this year. That’s 7% better than his career mark of 49.4%, and 8% better than his GB% last season. In fact, Lyles currently has the 10th-best groundball rate among all MLB starters. And with the Rockies playing outstanding defense, only 2.6% of ground balls hit off of Lyles go for infield hits."