As anyone familiar with sabermetrics knows, one can evaluate batting events by means of linear weights. What this means is that a single is worth about two-fifths of a run while a home run, because it can drive in the men on base, is worth over three times a single. Research has revealed that types of batted balls can assign similar values. Line drives are worth a lot, while infield flies are almost as good as strike outs. There is a problem in deciding what category to place a batted ball sometimes, especially the difference between a fly ball and a liner, as symbolised by the neologism 'fliner'. So one needs to treat these numbers with a degree of circumspection.
What this chart shows is the difference between a batted-ball linear weight and Fangraphs' wRC. wRC gives a supposed aggregate number of runs that should have been scored based on hitting events. Some people have flares falling in, while others hit the ball hard, but see it caught. The batted ball number also includes Ultimate Base Running, to make it more compatible with wRC. Note that the chart excludes pitchers' hitting. The first column is wRC, the second the batted ball expected runs and the third the positive or negative difference.
J.D. Martinez 60 41 +19 Victor Martinez 91 78 +13 Alex Avila 43 35 + 8 Miguel Cabrera 87 81 + 6 Rajai Davis 48 49 - 1 Torii Hunter 59 60 - 1 Ezequiel Carrera 3 4 - 1 Eugenio Suarez 25 26 - 1 Tyler Collins 0 1 - 1 Alex Gonzalez 1 4 - 3 Bryan Holaday 9 12 - 3 Danny Worth 1 5 - 4 Andrew Romine 12 20 - 8 Nick Castellanos 52 60 - 8 Don Kelly 13 23 -10 Austin Jackson 49 60 -11 Ian Kinsler 68 91 -23JD-Mart continues to be fortunate on the outcomes of his batted balls, although his luck has faded quite a bit. At the other end of the scale, Ian Kinsler has slumped quite a bit. Most of the other players have moved slightly up or down, although Victor Martinez has continued to hit above his batted-ball weight at about the same pace. I predicted last time that a slump might lead to a run production problem, which as I discussed earlier in fact happened after the All-Star break. I think it is important to note that Rajai Davis has been an adequate replacement for Austin Jackson with the bat — especially with such a strong showing from Eugenio Suarez at shortstop and slight improvement from Torii Hunter — but let's see what the fielding numbers tell us about his defence.