In 1993 Jody Reed came off a good year with the Dodgers. It wasn't great, but the Dodgers were happy with what he did and offered him a three-year $30m deal to stay with the team. (I might be wrong about the numbers and length, but it was around that.)
Reed said thanks, but no thanks and decided to become a free agent. The Dodgers were screwed, now they needed a second baseman and they targeted a good one in Montreal's Delino DeShields. Dan Duquette was the GM of the Expos and said, "Sure, you can have Delino but we want pitching, we'll take, oh I don't know, Pedro Martinez, if he's available." Dodgers GM Fred Claire was hesitant to give up Pedro (if you believe him) but Dodgers manager Tommy LaSorda thought that Pedro was too small and too skinny to last and he needed a second baseman, so he shipped Pedro north.
Pedro obviously went on to star for the Expos for a few years and when he became so good that the club couldn't afford him, Duquette (who by this time was in Boston) traded for him AGAIN this time for Carl Pavano and Tony Armas Jr. (based on these two deals alone, Duquette should be in Cooperstown, but I digress ...) and the rest is Red Sox history.
But what happened to Reed, certainly he made his millions, right? Well, he jumped into the free agent pool and no one gave a shit. He floundered in the deep end all winter until Milwaukee threw him a life raft in the form of a one-year, minor league deal worth well south of the $10 million+ dollars he thought that he was worth. He bounced from the Padres to the Tigers after that and was out of baseball by 1997.
So without Jody Reed overestimating his worth, the wheels don't get set in motion for Pedro to be traded to Montreal before coming here. Because if Pedro super-novaed in LA like he did in Montreal, they had the cash to sign him and never would have sent him to the Red Sox. And who knows if we would have won it all in 2004. We may have, but it would have been less fun.