Damon is the best leadoff hitter in baseball.
However, he has a nagging shoulder injury that could limit his production -- he just hasn't looked the same at the plate for the last few games, though he's kept his hitting streak alive. If you're looking for a guy that's a lock for 20 homers and 20 steals, Johnny is not your man. However, assuming he doesn't have to spend time on the DL, I would expect him to hit about .300 for the rest of the year and finish with at least 110 runs scored, 15 SB, 12 HR, and 85 or so RBI. It's not out of the question that this is an "upswing", but my guess is that the guy has just matured as a ballplayer -- he's been hitting over .300 for a year and a half now.