Chris Chambers, 2001 2nd Rd (a) - 3 years (52nd) 164 catches (54.75 per season), 36 returns for 811 yards (22.5 avg.), 3488 all-purpose yards (15.8/rec) and 18 TDs.
Chambers did not have 18 TDs in his first three seasons. He had 21 receiving touchdowns. (Ginn had 5)
What I do know is that for the last twenty-five years, Ginn has been the most productive WR we have taken in the early rounds of the draft in his first three seasons.
I'm going to have to completely disagree with you here.
If you're a kick returner on a bad team, as Ginn was, then you're going to quickly rack up "Total Yards" stats. So the significance of a returners yardage totals on a bad team is not as great as it may appear to be to some. And obviously "Total Yards" has absolutely no bearing on the productivity of Ginn as a wide receiever.
Chris Chambers was far and away a more effective and impactful player
(let alone receiver) in his first three years - and I'm taking Ginn's return game into account when I say that. But let's compare only their receiving statistics directly for a second:
2001 - 883 yrds, 7 tds
2002 - 734 yrds, 3 tds
2003 - 963 yrds, 11 tds
2007 - 420 yrds, 2 tds
2008 - 790 yrds, 2 tds
2009 - 454 yrds, 1 td
Ginn's return totals do not make up the vast difference in productivity here, because the overwhelming majority of Ginn's return efforts just got us back around the 20 on a kickoff return, which is not uncommon... and Chambers TD totals alone might outweigh every statistic Ginn has put up combined. So in my opinion Chambers was clearly more productive in his first three seasons.