Question that I have been thinking about as I ponder for spring training. How many Lefty starters is too many in a rotation?

Over the past couple years (prior to last year), Atlanta was devoid of Left handed starters. Many added that this fact put them at a disadvantage for a few reasons (from game to game as well as aligning with opponent strengths).

Well it is possible this year that the rotation changes.

Teheran - RHP - could do well, could be traded if the right deal arrives
Folty - RHP - could make the next step, could become a good #2-#3
McCarthy - RHP - probably ok, likely traded at deadline
Newcomb - LHP - Could take the next step and be at least as good as Folty was last year
Gohara - LHP - Could prove to be just as effective as last year (with better luck) and a good #2-#3
Fried - LHP - Could prove that blisters was his issue and he is capable MOR guy
Allard - LHP - Could show he really overcame issues mid-year last year, and prove he is ready

So it is entirely feasible that with a trade of Teheran & McCarthy by the deadline, our starting rotation could be Gohara, Folty, Newcomb, Fried, Allard (LHP, RHP, LHP,LHP,LHP).

WOW what a difference...but is that too lefty focused. What are the advantages / disadvantages of so many south paws?