Pacquiao vs. Marquez 3: Where Will a Marquez Upset Rank in History?

While Juan Manuel Marquez is indeed an underdog going into Saturday's pay-per-view clash, it isn't the same as say, Buster Douglas vs. Mike Tyson.

Marquez is an accomplished fighter.  He's 38-years-old and has won four world titles in his own esteemed career.  So Marquez is no youngster or inexperienced fighter. 

Most importantly, Marquez has already proven he can beat Pacquiao in the eyes of at least one judge. As he received the nod from one judge in their second bout.

In their second fight, Pacquiao won a disputed split-decision over Marquez.  Many thought Marquez out-boxed Pacquiao in that fight, or at least, it should have been called a draw.

The deciding factor on the pro-Pacquiao cards was the third round knockdown of Marquez.

Pacquaio scored three knockdowns in the first round of their first fight.  He was out-boxed from that point on, but escaped with a draw on the strength of the knockdowns in the first round.

It can be reasonably concluded that without the knockdowns, Pacquiao could have lost two decisions to Marquez.  Because of that, this upset would be fairly minor as far as upsets are judged.

Unfortunately for Marquez, knockdowns are a part of boxing.  In this case, they exhibit superior punching power, which will be even more apparent at this elevated weight of 144 pounds.

Marquez will fair worse at a higher weight.  The previous fights saw them at 130 and 125 pounds.

The upset talk is for nought.  Pacquiao will win by TKO.