"He'll do a little bit of everything," Hinch said. "He'll touch on the hitters' approach, he'll work with our hitting coaches and our hitters. He'll be in and around the cage. He'll work a little bit with the first basemen, with [bench coach] Trey Hillman, [first-base coach] Rich Dauer. He's a great personality to have around. He'll soak up a few days of what we're doing, and we'll get some things out of him he can offer to help our players."
Berkman, with a 15-year career that included 12 seasons in Houston, is one of the game's greatest switch-hitters. He retired in 2013 after playing for the Rangers, but he still ranks in the top five among the Astros' best hitters in batting average (.296, fifth), on-base percentage (.410, first), slugging percentage (.549, first), runs scored (1,008, third), hits (1,648, fifth), homers (326, second) and RBIs (1,090, third).
"It's good for our guys to be linked to the successful players in the past that are really invested in the Astros," Hinch said. "I welcome it, our coaches welcome it. They have a lot of experience to pass along."
Roger Clemens, a special assistant to the general manager, spent a day in camp last week and will return, and Nolan Ryan, Craig Biggio and Jeff Bagwell are scheduled to come to camp as well. Ryan, an executive adviser, will be in Kissimmee, March 4-11 and 25-31. Bagwell will arrive in camp March 10, and Biggio, also a special assistant, typically spends a few days in mid-March.
Hinch hinted other special guests will be in camp at some point, too.
"I've got a few ideas on guys I have history with that aren't exactly former Astros, but nothing I can confirm or deny yet," he said.