Starting in 2020, rosters now only expand to 28 instead of 40.
The bigger change, which would have irked Bobby Cox bigly, is that pitchers must now face a minimum of 3 batters. No more inserting a reliever for lefty on lefty matchups and then pulling him for another reliever.
This would have effected 674 relief appearances last season, 30% of which were in September during the pennant race (after rosters had expanded).
Any thoughts on how much effect this could have during crunch time of the season? Maybe we’ll start seeing more complete games, too.