Let's see, I played 4 sports in high school until my senior year when I went to 2 and the attended a small college and was able to play 2 sports there. After college I played baseball at a higher level for 2 years until a back injury forced me to retire from said sport. So I did play and then coached baseball for several years. Please don't tell us you can tell the people that never played a sport.
As for your comment about not always showing up with the same intensity, I always was up for the game I was in. And the reason I was is because I wanted to win every time I stepped on the field. At this level of college basketball, at this time of the season, with so much to play for and at this point in their careers, there is no reason to not be up for the game. It doesn't mean you'll win the game. But at least your effort will be 100%.
I'm in my mid 50's now. Don't play anything sports wise except golf. But I'll say this. We have a group of 4 parents who, during the winter months, get together for a game of domino's every other weekend. Sad to say, but I'm as competitive with that as I was when playing. I hate to lose. The only way to lose the least amount of time is to play with full intensity all the time.