Burnes struck out all three batters faced in one inning Friday against the Rockies.
Arizona manager Torey Lovullo said Tuesday that Burnes will start Friday's spring opener against the Rockies, Alex Weiner of Arizona Sports reports.
Burnes and the Diamondbacks agreed on a six-year, $210 million dollar contract Friday, Jeff Passan of ESPN.com reports.
Burnes rejected the Orioles' $21.05 million qualifying offer Tuesday, Rich Dubroff of BaltimoreBaseball.com reports.
Baltimore offered Burnes a $21.05 million qualifying offer Monday, Jake Rill of MLB.com reports.
Burnes will start Game 1 of the American League Wild Card Series for the Orioles, Roch Kubatko of MASNSports.com reports.
Burnes (15-8) yielded three hits and three walks over seven scoreless innings Friday, striking out eight and earning a win over Detroit.
Burned (12-7) took the loss against the Dodgers on Wednesday, allowing six runs (one earned) on five hits over five innings while striking out four.
Burnes (12-5) took the loss Friday against Boston, allowing eight runs on 10 hits and three walks over four innings. He struck out seven.
Burnes (9-4) took the loss Wednesday against the Cubs, allowing three runs on nine hits over six innings. He struck out five.