"He seems like himself, really," said Mattingly. "That's Dre. He always wants to do well. He's always angry. That's him, that's the way he plays on the field. Off the field, he's one of the easiest guys to get along with. He's a pleasant guy. Some guys play with an edge that they have to have to play. Then there's Rickey [Henderson]; he was happy-go-lucky, talking to people in the stands and tearing it up."
Mattingly said he hasn't been told that Ethier has any physical restrictions coming off minor knee surgery in September.
"The guys we know we'll play two days, then give them a day to work on things like find their timing [in camp]," he said.
Mattingly also said he wasn't particularly worried that Ethier would be distracted by his contract status as he heads into his free-agent season.
"I've seen guys put too much pressure on themselves, and if we see that, we'll talk about it," he said. "Some guys flourish knowing they've got something on the line."