On the days Gio Gonzalez starts, he blares Motown music throughout the Washington Nationals clubhouse, flits around the room and chatters at teammates, reporters, broadcasters, anyone who will listen. He grew up in Miami and became a professional out of high school. He is a left-hander, a curveball maestro and an unrepentant goofball. On the days Stephen Strasburg starts, he arrives later than most teammates and glowers in almost total silence, rarely leaving the small circumference around his locker. He grew up in San Diego and went to college for three years. He is a right-hander, the hardest-throwing starter in the league and a natural introvert. "One's a butterfly traveling at 150" mph, pitching coach Steve McCatty said. "And the other one's a plodder on that straight course."