The 2018 NCAA Division I Baseball season, play of college baseball in the United States organized by the National Collegiate Athletic Association (NCAA) at the Division I level, began in February 2018.
Finally, one other Division I team changed its institutional and athletic identities immediately after the 2017–18 season.
IPFW's academic programs in health sciences transferred to the IU system as Indiana University Fort Wayne; all remaining academic programs were transferred to the Purdue system as Purdue University Fort Wayne (PFW).
Shortly before the dissolution took effect, but after the school's baseball season had finished, the athletic program announced that it would henceforth be known as the Purdue Fort Wayne Mastodons.
The teams in each conference that win their regular season title are given the number one seed in each tournament.