I wouldn't take that deal if I were Tatis. He's going to be a free agent at age 26. Who knows what the economics of the game will look like in 4 years, or his performance, but I would imagine between his talent, age, and marketability, he could easily break $400M if he stays on the same path he's on now. That's on top of his arb numbers which would likely be pretty high. He just signed a national endorsement deal with Gatorade, and has deals with Adidas and BMW as well. He'd be fine waiting a couple of years. Then again, maybe he just wants 11 years of not having to worry about MLB money, and can focus on making money in other ways.