Bradley, who posted a 12-0 record and 0.67 ERA in 63 innings for Nitro (W.Va.) High School as a senior, signed for $643,500.
Rowland, out of Cloverdale (Calif.) High School, received $395,000. Rowland, who drew comparisons to the Marlins' Josh Johnson, compiled a 0.32 ERA in 65 innings last year. He is the son of former Major Leaguer Rich Rowland
"Do they have a lot to learn about pitching?" D-backs scouting director Tom Allison said on the day the pair was picked. "Absolutely. But they've been successful and dominant at their level, and that's important. They know how to win. We expect that they're going to be Major League starters. Certainly, anytime you take high school starting pitching, there are risks, but these guys checked off a lot of boxes, and they're both truly very excited to start their careers."
Both will start their pro careers with Arizona's advanced Rookie League team in Missoula, Mont.