I don't think that anyone mentioned rest over playing the game. There is a difference between "rest" and leaving early to begin a conditioning program, throwing program for fall and taking a class or two.
In the past, many high draft picks sign late, missing the entire season (the new signing date will end that) and most players, especially pitchers are watched and pitch counts and innings are limited. I beleive that the first round pick from a few years ago drafted by cardinals was (pitcher) was shut down (elbow soreness), they cited the large work load in HS (including showcases, tournaments and coming from a warmer climate state) had taken it's toll. Many of these top prospects signing late still put in limited work the following year and then head to Fall League for more work.
Correct me if I am wrong but many players that play (especially pitchers)after their first college season come back in fall and play a lessor role. And for the very few that do play fall/winter ball on the pro level, many do not hit or pitch as much as they maybe should have(depending on what went on previous season). Same for the college game, pitchers not getting in enough innings, or hitters not enough at bat. Summer baseball, definetly.
Does that work for teh player that is borderline on his GPA and on teh verge of becoming ineligible. No amount of baseball you will play will help that stat.
Fall is the time that coaches work instruction, how can a coach do that if the first season pitcher needs to shut down for awhile, at one point, which becomes more important? Keep in mind I am speaking of the player entering college for the first time.
Again, this is not about the pro game, this is about college players, and for some getting acclimated to their new environment, working on conditioning, or rehabbing from a nagging injury may be more beneficial. Most newly drafted players are on a lessor work load depending upon their roles, some just for adjustment. The player entering college doesn't have the benefit of a lessor role, fall is the time that one needs to out work their competition, not everyone can do that after a full season and full summer.
Since comaprison keeps coming up, come end of august, most pro players are shut down for months.
It was a good question asked, with good answers, and as I stated it becomes an individual decision. In our case, even though DK didn't pitch as much as the pitchers going through recruiting, I do beleive that for him better conditioning, introduction to a better throwing program taking a course or two would have served him better than playing travel ball (and I mean travel from one part of the country to the next). More importantly a player, especially a pitcher, should be able to play the summer after his first season, rather than the summer before.
Comparing college players to latin professional players makes no sense to me. 95% or more of college players will never see the pro game.
We all have our opinions, but my suggestion is that each one discuss with coach, and make their decision based on what is best for them.