New NCAA Baseball Rules for 2027: What Umpires Need to Know
The 2027 college baseball season will bring changes at first base, expanded video review, new limits on offensive communication and, in Division I, more clock procedures. The NCAA has approved the major changes for the 2027 and 2028 seasons. Umpires should also watch for experimental rules that apply only when a conference has received approval.
A double first base becomes the standard
A double base at first will be required in regular season and postseason games across all three divisions. The NCAA lists an exception for games at facilities that are not owned by an institution, where 18-inch square bases may be used. Schools may also use 18-inch bases at their own facilities if they use a double base at first; 15-inch bases remain the standard size.
For umpires, this makes first-base positioning and the batter-runner’s lane especially important points of preseason review. Crews should confirm the base configuration before the game and review how the double-base rule applies to plays at first.
More calls can go to video review
Where video review is used, the NCAA will permit review of any play that could change a fair-ball call to foul. Tag plays may also be reviewed regardless of where they occur on the field. Those changes apply across Divisions I, II and III.
That gives crews more situations in which an initial call may be revisited. Clear communication about the call on the field and the result of a review will remain essential.
Teams get six offensive conferences
The number of offensive charged conferences increases to six. A batter’s request for a conference can reset the action clock, while a coach may participate in no more than three offensive charged conferences, plus one additional coach conference in extra innings. This change applies in all three divisions.
Umpires and teams will need to keep an accurate conference count, particularly late in games.
Division I adds 30-second procedures
Division I will use a 30-second timer between batters, beginning when the pitcher has the ball near the mound after the previous play. New 30-second procedures also apply to mound visits and offensive timeouts. The NCAA’s approved document spells out when each timer begins and how warnings and later penalties are administered.
Clock operators, coaches and umpires should review those procedures together before the season. A shared understanding of when a timer starts can prevent avoidable disputes.
Technology rules change, too
Electronic communication devices in Division I will be limited to defensive purposes; teams may not use them to communicate with offensive players during a game. Division I teams may use controlled technology in the dugout for scouting and analytics, subject to restrictions that include limits on pitch-location access and a minimum half-inning delay for video from the current game.
Across all three divisions, bat sensors may collect swing data during games if attached to or embedded in the bat’s knob. Teams cannot access that data during the game.
Will NCAA baseball use ball-strike challenges in 2027?
Possibly, in approved conference play. The electronic strike-zone challenge system is a 2027 experimental rule, not a universal rule for every NCAA baseball game. Under the approved experiment, a batter, pitcher or catcher can immediately signal a challenge by tapping a cap or helmet. Each team begins with three challenges, keeps a successful challenge and loses an unsuccessful one. The NCAA says these experimental rules will not be used during its postseason.
Approved conferences may also experiment with a limit of two pitcher disengagements per plate appearance and a three-batter minimum for pitchers. Umpires should check their conference’s instructions before assuming either experiment applies to an assignment.
Getting ready for the season
The best preseason preparation is practical: review the double-base procedures, practice the expanded review situations, learn the conference-count and clock rules, and confirm whether your conference is using any 2027 experiments. Division I umpires should pay particular attention to the new timing and electronic-device provisions.
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Rule summary based on the NCAA’s published 2027–28 major rules changes and 2027 experimental rules. Consult the NCAA rule book and your conference’s instructions for game administration.