Even if we have him for the rest of the season Headley is an upgrade offensviely most likely and defensively. I hate all this talk about how the Blue Jays have played much better defence this season. The team has above average defence at only 2 positions when fully healthy (CF and 2B or 3B which ever Lawrie plays).
Navarro, Melky, Reyes, Encarnacion are all well below average defensively. Thats half the team.