17.4.2 Preseason Practice. An institution shall not commence practice sessions in baseball prior to: (Adopted: 1/14/97 effective 8/1/97, Revised: 1/9/06 effective 8/1/07, 4/30/09, 1/15/25 effective 8/1/25, 3/17/25 effective 8/1/25)

(a) Nonchampionship Segment. September 1.

(b) Championship Segment. Thirty-five days before the first permissible contest date. An institution shall not engage in more than 27 days of countable athletically related activities before the first permissible contest date. Any countable athletically related activities (e.g., conditioning, skill-related instruction, film review) that occur within the 35-day period shall count against the 27 days of countable athletically related activities. If the American Baseball Coaches Association Convention occurs within 35 days before the first permissible contest date, an institution shall not commence preseason practice before the Monday immediately following the day of adjournment of the American Baseball Coaches Association Convention.