From Newsday:

The phrase, “He needs to pick a lane and stay in it” would’ve been invented for him, if it hadn’t already been out there. He fired GM Wayne Krivsky a little more than two years into Krivksy’s reign, despite the fact that Krivsky did a pretty good job by most accounts. He has a relationship with his new GM, Walt Jocketty, from St. Louis, so maybe Castellini will take a step back now and let Jocketty work.