CLEARWATER, Fla. — Saturday was Bryce Harper's last day in Phillies camp until potentially March 19 if Team USA makes it all the way to the World Baseball Classic championship as it's favored to do.The Phillies play 16 Grapefruit League games between now and then, half of them at home, so it's safe to say Harper would have played in at least eight with the Phils during that time.While he's gone, they will have to rotate others in at first base. Otto Kemp could play there a bit, although the Phillies are focused most on getting him reps in left field to prepare him for a potential platoon with Brandon Marsh. Utilityman Dylan Moore will also see time at first base, one of seven positions where he has substantial big-league experience.…