The Cubs right-hander wasn't really in the race until the second half of the season, when he put together a 15-start stretch in which he went 12-1 with a 0.75 ERA. He finished the year 22-6 with an ERA of 1.77.
The snake!!! It was fun playing behind @JArrieta34 every time he took the mound. Congratulations to you and Brittany
— Anthony Rizzo (@ARizzo44) November 18, 2015
"I was locked in, and what I mean by that was my timing and my tempo and my delivery were as close to perfect as I feel they could be," he told reporters in a conference call after winning the award.
After pitching 229 innings—70 more than his previous career high—Arrieta's performance suffered in the playoffs, pitching to a 3.66 ERA in three starts.
"The fatigue did set in," he said. "I'll be the first to tell you."
In the American League, Keuchel narrowly beat out David Price, who helped lead the Toronto Blue Jays to the AL East crown after being traded from the Detroit Tigers.
Though he didn't help end a 15-year playoff draught, Keuchel led the Astros to their first playoff appearance since 2005.
Owner of a 2.48 ERA, Keuchel led the AL in wins (20), innings pitched (232), and WHIP (1.02).
Congrats to @kidkeuchy for winning the American League cy young!! He was my pick and I think the writers got it right!!
— David Price (@DAVIDprice14) November 18, 2015