Is Jake Arrieta the best pitcher in baseball?

[d2bets]

Last 7 starts:
7-0, 0.37 ERA
50.3 innings, 23 hits
0 earned runs allowed in 6 of 7 starts

Last 15 starts:
12-1, 0.99 ERA
109 innings, 54 hits
All 15 quality starts

And now 18-6, 2.03 ERA overall