Was Archie Manning the only Saint to get Player of the Year?

2009 Yes, 2011 No. Rodgers had a season for the ages in 2011
All Rodgers did was throw like three fewer INTs and score 1 or 2 more rushing TDs. Brees threw more TDs and broke a decades-old passing yards record (and had about 800 yards more than Rodgers). He also set a new single-season completion record (breaking his own record, from 2009), IIRC.

I'm not saying you can't make the case for A-Aron's award. But to say he was hands-down better than Brees that year (as the MVP vote tally indicated) is just unsupportable. The 2006 MVP vote was closer, and I think the case for LaDainian that season is better than the case for Rodgers in 2011.