A couple of things about the Cubs' BABIP. As others have said there was not nearly enough written about the Cubs' pitching influencing this. You can't just chalk it up to, "Well, some of it is defense and the rest is luck." We need to go deeper. As others have pointed out, the Cubs pitching staff is pretty great at getting weak contact. They lead the league in soft-hit%. And, this is also important -- and I've talked about it in my articles about Cy Hendricks and in my article about the Cubs and weak contact earlier this year. The Cubs are able to get weak contact on both ground balls and fly balls. The Cubs are a ground ball team, ranking 5th in GB%. That's very good. But ground ball teams usually struggle with balls hit in the air. Balls hit in the air against ground ball pitchers are hit on a lower line, and don't hang in the air as long, giving outfielders less time to get under the ball. Of teams with at least a 46% GB%, here are their ranks in vertical launch angle on all non-ground balls: https://baseballsavant.mlb.com/statcast_search?hfPT=&hfZ=&hfGT=R%7C&hfPR=&hfAB=&stadium=&hfBBT=1%7C2%7C3%7C&hfBBL=&hfC=&season=2016&player_type=pitcher&hfOuts=&pitcher_throws=&batter_stands=&start_speed_gt=&start_speed_lt=&perceived_speed_gt=&perceived_speed_lt=&spin_rate_gt=&spin_rate_lt=&exit_velocity_gt=&exit_velocity_lt=&launch_angle_gt=&launch_angle_lt=&distance_gt=&distance_lt=&batted_ball_angle_gt=&batted_ball_angle_lt=&game_date_gt=&game_date_lt=&team=&position=&hfRO=&home_road=&hfInn=&min_pitches=0&min_results=0&group_by=team&sort_col=launch_angle&player_event_sort=start_speed&sort_order=desc&min_abs=0&xba_gt=&xba_lt=&px1=&px2=&pz1=&pz2=&ss_gt=&ss_lt=#results The Cubs have some innate ability to get weak contact on fly balls, despite being a ground-ball team. This is incredibly unusual. And this is absolutely going to help them suppress BABIP. I think BigSlick brings up a couple interesting points, too. I don't know how you would prove this or even if it's actually a thing. But it makes some sense. The Cubs' pitchers give their elite defenders better opportunities to make plays. If there are rockets being hit all over the field, your defenders are going to struggle to make plays on them. Sure, if you have good defenders, they are going to make more plays than others will. But, it's essentially taking a probable (or expected) .500 average and turning it into something like a .450 average. But .450 is still bad. I've written about this phenomenon in regards to Addison Russell a few times on here. For instance, look at all balls hit at least 100 mph and at a vertical launch angle between 0°- 9° and a horizontal launch angle between -25°- 0°. (These are the hard, low liners I've written a lot about -- hit into what you would consider the shortstop's "zone."): https://baseballsavant.mlb.com/statcast_search?hfPT=&hfZ=&hfGT=R%7C&hfPR=&hfAB=&stadium=&hfBBT=&hfBBL=&hfC=&season=2016&player_type=pitcher&hfOuts=&pitcher_throws=&batter_stands=&start_speed_gt=&start_speed_lt=&perceived_speed_gt=&perceived_speed_lt=&spin_rate_gt=&spin_rate_lt=&exit_velocity_gt=100&exit_velocity_lt=&launch_angle_gt=0&launch_angle_lt=9&distance_gt=70&distance_lt=&batted_ball_angle_gt=-25&batted_ball_angle_lt=0&game_date_gt=&game_date_lt=&team=&position=&hfRO=&home_road=&hfInn=&min_pitches=0&min_results=0&group_by=team&sort_col=babip&sort_order=asc&min_abs=0&xba_gt=&xba_lt=&px1=&px2=&pz1=&pz2=#results The Cubs' BABIP on these balls is .389. The next lowest is .511. So, yeah, Addi/Javy have been way better than other shortstops at turning these balls into outs. They are the types of balls that are likely to go for hits, regardless of your defense. And I think Addi's defensive metrics are being held back a little, because he hasn't had the opportunity to make as many plays on these balls. And you get more credit for making tough plays. At the same time, you don't get it held against you very much for not making these plays, because you shouldn't be expected to make those plays. Take Zack Cozart, who is a fine defensive player, ranking in the top ten in DRS and UZR, with 9 runs saved. The Reds have turned these types of batted balls into outs 23 times. The Cubs have turned them into outs 22 times. There's a problem, though. The Reds have given up 55 of these batted balls, to the Cubs' 36. The Reds rank in the top ten in terms of BABIP on these balls. They've done a good job against them defensively. But, they certainly aren't better than the Cubs against these balls. And, as much as I would like to see Addi's defensive numbers go up, I do not want more of these types of balls hit towards him. These batted balls are bad. They do bad things. Seeing more of them would be a bad thing, even if Addi is amazing at stopping them. That's where you start drifting into a weird, uncharted territory. The Cubs are amazing defenders, capable of turning dangerously-hit balls into outs like no other team. Except, they also give up fewer dangerously-hit balls than every other team. And, that's fine. It's easier on our elite defenders because of our elite pitchers. They don't make as many highlight reel plays as they would with worse pitchers in front of them, but we don't want them to do so. We are fine with how it is. Elite contact management and elite defense working together, in tandem. When you are good at every facet of the game, you can't be measured like other teams. You are different. There are a lot of things going on that don't go on with other teams. That's why you are historically great. I also think there might be something to this, from BigSlick: The Cardinals were very good at a lot of these things last year, too. But they started out the year on an historic pace and then fell back to the pack some as they regressed as the year went on. The Cubs have been this good, nearly exactly this good, all year. He talks in the article about how he said the Cubs' BABIP would go up, back when it was .250 earlier in the year. And it did... all the way to .251. I'm inclined to believe there might be something to this line of thought from BigSlick. It's impossible to prove. But I think there is something to the fact that the Cubs have just been historically great at it all year. With the Cardinals, you could break their season up into sections and see that, well, they were very good at it for most of the year, but this one little section here at the start looks like an outlier. The Cubs have no outlier. They aren't coasting off of some incredibly fluky and lucky early- or late-season run. They've just been amazing at it... all the time.