Obstruction Enforcement Has Dropped - What's Going On?

After MLB made base blocking obstruction a point of emphasis prior to the 2024 season, we saw several instances of enforcement during Spring Training. But as the season progresses, obstruction calls have decreased, leaving some otherwise-obstruction calls going unanswered.

This video features a Yankees-Guardian obstruction play at first base wherein the first baseman appears to block the runner's path with a leg while fielding to the opposite side of the base.

To be clear, Official Baseball Rule 6.01(h)(1) has not changed and obstruction is still "the act of a fielder who, while not in possession of the ball and not in the act of fielding the ball, impedes the progress of any runner."

Instead, the point-of-emphasis instructs umpires to call obstruction when fielders illegally block runners at the base (mainly on pickoffs and steals). When a fielder has the ball, they are protected and can block a runner, but the POE concerns the "in the act of fielding" exception to obstruction liability, with a specific focus on fielders who use this exception as a loophole to block a runner's access when their act of fielding has nothing to do with needing to occupy space in the runner's path to catch the ball.

Seeking to close this loophole, MLB has now clarified that it is still obstruction when a fielder who is in the act of fielding blocks a runner's path to the base by placing a leg or foot in their way, when the fielder did not need to occupy that space (and did not need to block the runner) in order to field the ball.

Ejection 017 (Cory Blaser tosses Dave Martinez) was all about an obstruction no-call on a stolen base attempt by 2B Umpire Nate Tomlinson, who initially ruled Washington baserunner Ildemaro Vargas out at second base, a call affirmed by Replay Review after Martinez's challenge.

Because obstruction is not a reviewable play (go figure, home plate collision/plate blocking and sliding into a base to break up a double play are reviewable, but 'ordinary' obstruction and interference are not), Replay couldn't look at the obstruction aspect of the play, which left its sole task as determining whether or not the runner was tagged off-base with the ball, which he was, so he was called out.

Hence, Replay Review due to its reviewable vs not reviewable dichotomy highlights even more how an on-field obstruction call is vital, and also, how these on-field calls are dropping like fly balls to Fred Snodgrass.

Video as follows:

Alternate Link: Obstruction enforcement is decreasing, leading to some added controversy