Baez also has a .077 BABIP vs LHP and a .212 BABIP overall right now. If this is really a break out vs RHP for Baez I don't think he's in the Bryant/Rizzo 140+ wRC+ level but he could easily be in the 130 range. For the sake of argument I'll call it 125. What's a 125 wRC+ 2B look like? Brian Dozier. He was worth exactly 5 fWAR last year and he's no where near as good with his glove.
Whether or not that's a safe bet was never the point. I wouldn't take the over on .300/.400/.500 on Baez but if you were to tell me based on what we've seen thus far with regard to his hitting vs RHP that he would be something like .280-.290/.360-.370/.500-.550 I could buy that. I mean that's probably best case scenario or close to it but his improvement vs RHP is that good. Assuming his prowess vs LHP comes back and that .077 BABIP is a total fluke he's extremely difficult to pitch to. He has monster power potential obviously. He makes good contact when he does connect(.327 career BABIP). The way you got him out in the past was he A) wouldn't walk and B) would swing at a lot of bad shit. But he's currently sitting at a 10.2%/22.0% bb/k rate which is fantastic for a guy who's career rates are 5.3%/29.0%. If that has changed which it appears may be the case then you got a guy who is going to hit for probably 20-25 points higher average(.295 range) and have a on base of roughly 40-50 point higher(.365 range).
Maintaining a .431 ISO is completely unrealistic. What I'm seeing is when he makes contact he is crushing it. BB:SO 1:2.2 so very solid ratio.
I really believe that he is waiting on a pitch to rake vs free swinging. Which leads to many off centered base hits. 2 singles/3 2B/2 3B/ 5 HR/ 6 BB.
Line Drive: 25%
GB: 30.6%
FB: 44.4% (18.8% are pop ups/31.3% have gone yard)
Pull: 44.7%/ Center: 26.3%/ Oppo: 28.9% So half of his balls in play are to left field.
44.7% of his hits are hard contact.
If I had to guess: This could be his break out season. He is doing everything right. The law of avg's will bring up his BABIP and lower his ISO but what matters is he is taking 10% walks and half of his hits are hard and not stuck in left field.