The 6 years include 3 arb years which might pay him up to $50M total. You'd really sign him to $150M/3 for the following 3 years?
Plus, the $33.3M luxury tax hit would be worse than my 10 year offer of $275M/10.
I'd even prefer $300M/10 over $200M/6. Here's why:
1) Betts is young enough that his last 4 years are still close enough to prime to not worry too much.
2) The luxury tax hit would be lower by including the arb years in the extension (same with the $200M/6).
3) Contract costs in 6 years will likely be way higher than now, and Betts would likely get $350M/10 if he was a FA right now and 27 years old (not 24).
Bottom line: try like hell to lock him up before he hits the open market. He's worth the risk. I don't see flame-out potential with Mookie.
I hear 700's argument about "speed" guys and how they do not tend to hold top value pretty well, but Mookie has power, OB skills and is a tremendous defensive player beyond his speed.