I was thinking about Jedd Gyorko from the Padres. Moved to 2B off of 3B, played 125 games, and put up a 2.5 WAR. He never had an .ISO over .275 at any level, yet he hit 23 HR (13 of those at PetCo) in 525 PA. Unlike Baez, Gyorko has always had a low strikeout rate, ~17% in the minors, and that up-ticked to 23% in the majors. He did have a 9 game stretch of hitting .100, though. Baez, however, has always had a high strikeout rate, ~ 25% in the minors (28.8% last year), but huge power comes along with that (ISO .213 at its lowest, .344 at its highest).
Gyorko's 2.5 WAR last year would rank 2nd on our team, behind Welington Castillo (and most of his 3.2 WAR came from his defense, surprisingly).
Oliver just came out and predicted that if Baez played a whole season with 600 PA, he'd put up a 4.3 WAR:
143 G, 33 HR, 81 R, 94 RBI, 16 SB, 5.5/32.2 BB/K%, .244 ISO, .311 BABIP, .245/.297/.489, .338 wOBA, 111 wRC+
What would qualify a successful call up?
>85 G, >15 HR, >40 R, >50 RBI, >10 SB, >7.5/<30.0 BB/K%, >.200 ISO, >.300 BABIP, >.250/.315/.400, >.315 wOBA, >100 wRC+