Tim was a major candidate from the beginning. His securing the Republican nomination, over a "more conservative" candidate (Sullivan), was the reason that Ventura decided not to run. The only wild card in the race was how well Tim Penny (the Independence candidate, and former Democrat Congressman) would draw, and from WHOM he would draw.
Best find another analogy to support your case. Such analogies may exist, but Pawlenty isn't one of them. In fact, one of the keys to our election win last year was that Sullivan and Pawlenty both agreed to abide by the decision of the nominating convention and NOT pursue their competition into either a primary or the general election. Sullivan showed a lot of class (and character) in his withdrawl. Without that, and his wholehearted backing of Pawlenty in the general election, things may have come out quite differently.