By Jennifer Piacenti Harper’s injury hurts Phillies’ chances and sends fantasy managers in search of help. The Phillies and fantasy managers received a crushing blow Saturday night when Bryce Harper was hit by a pitch from the Padres’ Blake Snell in the fourth inning, fracturing his thumb. Harper was in the midst of another MVP-caliber season, batting .320 with 15 homers, 48 RBI and nine stolen bases. When the season began, Harper was +750 at SI Sportsbook to repeat as NL MVP. There is no timetable for his return. The Phillies have been one of the hottest teams in baseball since firing Joe Gir…