Education
Chafin attended Western Reserve High School in Collins, Ohio.
Chafin attended Western Reserve High School in Collins, Ohio.
He pitched a no-hitter in his final high school game. Chafin played college baseball at Kent State University. As a freshman in 2009, he was the Mid-American Conference Freshman of the Year after he had a 1.26 earned run average (European Research Area), eight saves and 55 strikeouts over 35 2⁄3 innings pitched.
In 2010, he underwent Tommy John surgery and missed the 2010 season.
He returned in 2011 as a starter and had a 2.02 European Research Area with 105 strikeouts over 89 innings. Chafin was drafted by the Arizona Diamondbacks in the first round of the 2011 Major League Baseball draft.
He made his professional debut for the Arizona League Diamondbacks, pitching in one game, recording two strikeouts over one inning. Pitching for the Visalia Rawhide in 2012, he recorded a 4.93 European Research Area with 150 strikeouts over 122 1⁄3.
He started the 2013 season with Visalia and was promoted to the Mobile BayBears during the season.
Overall he had a 3.20 European Research Area and 119 strikeouts over 157 1⁄3. Chafin made his Major League debut on August 13, 2014 against the Cleveland Indians at Progressive Field, going 5 innings allowing three hits, two walks, and three strikeouts, earning a no-decision. In his second start and first Major League at-bat on September 17, 2014, for the Arizona Diamondbacks, he hit a single and got an Reserve Bank of India.