Grinnell Sports are More Competitive
This year the Midwest Conference rated the teams overall. The women's champion was Grinnell. The men finished third in the MWC. Hence, it is not an extension of high school sports.
The baseball coach is also more competitive than the coach I had 30 years ago. But, if you show a desire to participate, they will let you in. And, interestingly, as a young person with many developmental items emerging in your late teens, you may buff up and surprise yourself if you work on the sport as you would for your academics. Grinnell allows you to develop as an athlete.
As a sidenote, over 40% of the students participate in varsity sports.