By Daniel Bates Shohei Ohtani joined some exclusive company on Saturday after cashing in with the Dodgers on a historic 10-year, $700 million deal. Baseball’s unicorn will make an unheard of $70 million per year; almost double the MLB’s previous high of $43.4 million. Here’s a look at the five biggest contracts in sports prior to Ohtani’s signing this weekend: 1. Lionel Messi, FC Barcelona (4 years, $674 million) Messi’s contract prior to coming to the states was the biggest contract value ever signed at the time and most thought it would stand some time. However, Ohtani and the Dodgers had ot…