Greinke threw one inning of live batting practice Friday, Brian McTaggart of MLB.com reports.
Catcher Martin Maldonado said Greinke was sharp and described his velocity as "in-season" during the pitcher's first session of summer camp. He's thrown fewer innings than most other starters at this stage of camp, so it's fair to wonder if Greinke will be ready to handle anything close to a full workload in time for the regular season.