From the Athletic article on Mervis.
"As the Cubs weigh their options for first base next season and think about how they want to rotate designated hitters in the future, Banner offered this view of the 6-foot-4, 225-pound slugger: “Another piece of this that people don’t talk about is he’s actually a good defender at first base. I know he’s a big guy and he might look like he’s lumbering, but he’s very athletic and he does a lot of things well.”