PHOENIX — Arizona Diamondbacks closer Paul Sewald knows that — in theory — Major League Baseball’s new Automated Ball-Strike system shouldn’t favor batters or pitchers. In practice, he thinks one side has gained an advantage.And it’s not the guys throwing the baseball.“It’s what (MLB) wanted — people on base,” Sewald said. “Tough time to be a pitcher. Balls flying everywhere, you’ve got a smaller strike zone. But you just go out there and do the best you can.”So … is Sewald right? It depends on which numbers you want to use, but it sure seems like the strike zone has shrunk.Walks have skyrocketed to near historic highs through the season’s first month. There’s no direct evidence ABS is the reason for the increase, but as D-backs catcher James McCann said: “Of course it is. What other rules have changed?”MLB players have drawn a walk in 9.8% of plate appearances this season through Wednesday’s games, which would be the highest rate since 1950. The rate is likely to come down as the season progresses — pitchers usually have more trouble finding the zone during widespread chilly conditions in northern cities during March and April.But even adjusted for the time of year, walks have made a massive jump from last season.Everyone knew the strike zone would change. MLB had to re-write its definition of the zone to accommodate the shift to robot umpires. The Official Baseball Rules long described a zone stretching from the midpoint of the hitter’s torso down to the “hollow beneath the kneecap.” The new zone is more precise. It starts at 27% of a batter’s standing height and stretches to 53.5%. The ABS zone is 17 inches wide, matching the width of home plate. All pitches are measured at the midpoint of the plate.The spike in walks doesn’t tell the whole story about who is benefiting during the ABS era. MLB’s league-wide batting average is down slightly to .240 through Wednesday, a few ticks below the .242 rate through last year’s games in March and April. That pokes a hole in Sewald’s claim that there are “balls flying everywhere.”The difference in opinion is fas …
