Driver never played professional baseball, but according to his bio on the Phillies website, played three years of college ball at the University of Puget Sound. Later he was the catching coach at Yale and since 2018 he has been the bullpen catcher and “receiving coach” with the Phillies. Here is his Twitter account, and here’s a bit more about him in a bio on Yale’s website.
This hire completes the Cubs’ coaching staff for 2020. Nothing has been announced by the team yet, but since Will Venable is being retained, I would presume that Venable will shift over and become third base coach. Mike Borzello, who has had the title of catching coach since 2012, added responsibilities as associate pitching coach/strategy coach in 2019, and presumably he’ll continue in that role as well as help out the catchers.