No, former NBA player and head coach Derek Fisher has not made a career change. Instead, a player by the same name has been called up by the Houston Astros. 

This Derek Fisher entered the 2017 season as Houston's No. 4 ranked prospect. He was hitting at a .335 clip with 16 homers, 45 RBI and 42 runs scored in 60 games at Triple-A Fresno at the time of the call up. Fisher himself was selected in the fourth round of the 2014 MLB Draft by Houston out of the University of Virginia. 

Look for Fisher to replace an injured (concussion) Josh Reddick in the lineup until the veteran is able to return. After that, there's a good chance he could take time from fellow outfielder Nori Aoki. 

At the very least, Fisher is someone we should keep an eye on early on in his MLB career. He's a five-tool talent with elite ability. Whether that translates to the Majors out of the gate remains to be seen.