He's active and aggressive, which I like. He's like a gnat that just won't go away--he may not bite much(score) but he's going to make your life miserable having to deal with him.
Your comment reminds me of this guy:
The 17'n Worm. An absolute beast on the defensive end.
He didn't score much, but I would definitely classify him as a "leader" on his team due to his defensive prowess and his level of effort. (How could any teammate of Rodman watch him play and not be inspired to play with maximum effort?)
Rodman is the type of basketball player that you would HATE to play AGAINST, but you would LOVE to have on your team.
If Garcia plays at a maximum effort and produces good results (e.g., defensive stops, steals, rebounds, hustle plays, frustrating the other team, etc.), then I would start him and I'd take him out only when he needs a breather or fouls out. I'd also point at Garcia and tell the rest of the team, "You see that guy right there? That's how you need to play if you want to win."