Going by the numbers...

BABIP: .267, .288, .267 and .253 A bit lucky this year

HR/FB: 10.1, 8.1, 13.0 and 7.8 Like BABIP a significant part of this is random fluctuations that a pitcher can't control. Again some luck this year.

GB percentage: 37.8, 34.8, 39.5 and 44.0 I like this trend

K rate: 8.2, 7.6, 7.7 and 7.6 Nothing to see here, keep moving

BB rate: 2.2, 2.1, 3.3 and 2.7 Better than last year, but not back to his old self yet

Avg Velocity on FB: 91.5, 90.4, 91.2 and 90.0 hmmmmm