Jimmy Butler is locked in and preparing for his 15th NBA season, but not the way you might think.The Warriors star recently got involved in the rapidly growing sport of padel, a racquet sport played by two or four people on an enclosed court that combines elements of tennis and squash. Butler is Reserve Padel’s honorary chairman of the Reserve Cup, which is an annual padel tournament in Spain.But Butler’s involvement in the sport isn’t solely for entertainment purposes during the NBA offseason, as he explained how padel actually is helping him become a better basketball player.“I get to be better on the basketball court because of this, I mean it,” Butler said Friday during an interview on CNBC’s “Power Lunch” from Spain. “Now hear me out: I like to play so many different sports to train for whatever upcoming season. This is another one. So I would like to say that my biggest investment is I kind of get to get better at basketball throughout this entire thing for myself.”Interesting.Butler was traded to the Warriors at this past February’s NBA trade deadline, and in 30 games with Golden State, he averaged 17.9...