My son is the quiet, lead by example type. He's the type coaches tell other players to watch how he carries himself and how hard he works. If my son comes off the field saying, "let's get some runs" that's an outburst for him. I tried to convince my son he needed to be more of the rah rah type in high school. He said it's just not him. As long as what a leader does points the team/teammates in the right direction it's the right thing to do.
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My son is like this. Quietly leads on and off the field. Very rare for him to have vocal outburts. Only been a few times I've seen him express emotion on the field. Once was when he hit a 2 out RBI double to tie the HS district championship game in the bottom of the 7th. Pumped his fist as he got to 2nd base. His team would go on to win in the 8th.