He gave good effort on defense, the results weren't there. In particular he often was matched up with Vince Carter, Walter Hermann, and other big 2s. During those stretches we got toasted on the defensive end.
His effort was almost Paytonesque (When Payton played for us). A lot of meaningless arm waving, jumping around, and posturing. I think Marbury actually tried but the last time he played defense probably was probably in grade school.
I agree with this for most of the time he was here last year, however, in the playoffs, he was playing some legitimate defense. In fact, for much of the playoffs, he was actually playing better defense than Rondo.
Honestly, I am not the least bit worried about Marbury's defense. 90% of the PGs in the league suck at keeping their men in front of them, and Marbury is probably middle of the road with that group.
What I am worried about is whether his shot has completely left him, or if he can get it back. If he can get back his deadly midrange shot, then he can be a killer backup PG on this team. If not, he becomes what he was for most of the playoffs...a less athletic Rondo, who does not have the quickness anymore to get to the basket when teams sag way off him.