Thanks for the topic, Francis!
After three poor college baseball years, my son had decided to just finish his four years with his teammates. That decision lifted the weight of baseball off his shoulders and, poof, he had an incredible last season, which resulted in being drafted as a senior budget pick.
Our baseball advice - from college on -was really limited to trying help him place baseball into life context. Having taken 10 years (split 2/2 years) myself to finish an undergraduate degree, I told him his time before 30 made no difference to success in life. We also told him that "real life" (i.e., the daily grind of a real job) was not a greener pasture or an easier grind; it was but a different pasture and the grind was tough. By the same token, we wanted him to fully commit to baseball, to leave it all out there, to give it everything, for it to be a crucible in his life (much like military service was a crucible in my life).
We did tell him he needed to reach a point where he would never peer into a mirror and ask to the face looking back "what if" when baseball ended.
He had told us that he had no interest in being a long-term milber and he had a powerful and versatile degree (econ) which paved the way for his future. (He had multiple job offers in his pocket by early senior year.)
When he was released, his phone rang with several organizations' offers, but the fun, joy, and time of baseball had passed for him. He turned all the offers down and never looked back. I think he's picked up a glove only a few times since then. (Golf has taken baseball's place for a while.)
Meanwhile, mom and dad's life expectancy increased at least a decade once he hung up his glove. Make no mistake, mom and dad essentially mourned the passing of a multi-decade shared experience that had run its course. We couldn't watch HS or college games for a few years as we sympathized with the parents of players who were struggling and we both had a weird form of PTSD! That mourning period gradually passed as we watched him spread his wings and fly.
He's 31; has a toddler and there is no doubt he will be involved in baseball as a parent. (He's already talking baseball to his son AND his wife was an incredibly competitive softball player.)
I know - by what adorns their walls, by his humongous collection of baseball t-shirts, by who he keeps in touch with - that he views baseball as having positively shaped and bent the arc of his life and provided opportunities otherwise not available.
It was not easy watching him trace his path (neither was it easy watching my non-athlete daughter), but for us it worked and all is well.
Now I can't wait for my grandson's first t-ball game. And the circle of life will go on!