Kirk Gibson is breaking news.
The D-backs manager made the announcement Monday morning, putting to bed any speculation over who would get the nod for the season-opening series against the Dodgers.
Corbin won 14 games for the D-backs last year, posting a 3.41 ERA and a WHIP of 1.17. It will be the 24-year-old's first career Opening Day start. He started four games against the Dodgers last season, though he struggled to the tune of a 2-1 record with a 5.12 ERA.
Cahill, 26, is in his third season with the team. Last year, he won eight games and had an ERA of 3.99. He started four games against the Dodgers last season, going 2-0 with a 1.40 ERA in those contests.