Greinke made his Diamondbacks spring debut on Friday, going two innings and giving up one hit while striking out two, Fox Sports Arizona's Steve Berthiaume reports.
All eyes were on Arizona's ace, who signed with the Diamondbacks on a six-year, $206 million contract during the offseason. If Greinke pitches to his potential, he should be a Cy Young contender this year, as he'll be supported by a team that finished second in the NL in runs scored last season.