@ballpeen said:

Better money and longer careers. Well, unless the arm gives out.  OB's don't stress their arm nearly as much.

If I had equal talent at baseball and football, I'd pick baseball every day and seventeen times on Sundays. 

@nickers said:

You forgot Mark Brunnel

I am sure there were others....of varying quality:  Scott Mitchell, Bobby Douglas,  Chris Simms, Tim Tebow, Matt Leinert,  Todd Marinovich,  Frankie Albert, Kellen Moore. And yes, confirmed that Paul McDonald was a southpaw. 

Actually, I think it was Moore and not Vick who was the last lefty to start an NFL game before Tua came along. 

I heard that one of the reasons for the dearth of  left handed QBs is that...if a lefty has the sort of arm talent it would take to be a good QB, that those persons are NOT  going in for playing football, but rather are going to play baseball, where left handed pitchers are in demand.   A  decent left handed pitcher  can have a long, lucrative career.....and not be chased down and knocked on their ass constantly by  300 pound  defensive linemen.  Some say that lefty Clayton Kershaw could have had the talent to be an NFL QB but chose baseball instead.

@the-gipper said:

Here is an interesting factoid:

For several years before 2 years ago,  there were  -0-   left handed  Quarterbacks in the NFL.   Why?  No one knows.  There certainly have been outstanding lefty QBs in history:   Steve Young,  Ken Stabler, Jim Zorn, Boomer Esiason, Michael Vick.    But there like been none since Vick retired.    However, now, there is one  lefty:   Tua Tagaviola (sp?). 

I know the Browns have had a couple of  Left handers.   I think Paul McDonald was left handed.

Were there any other Left handed Browns QBs? 

You forgot Mark Brunnel

How old was he?  That grey beard makes him look  60. 

And, by the way, obviously he played for the Browns, but why do I not remember him?