Eflin's injury isn't believed to be related to his past knee injuries.
WATCH: Phillies' Nick Castellanos preserves ninth-inning tie by throwing out Braves' Luke Williams at home
Phillies' Zach Eflin to be reevaluated after pitching simulation game and feeling 'a little sore
5 things that went right and 5 things that went wrong for the Phillies in first half – The Morning Call
5 things that went right and 5 things that went wrong for the Phillies in first half – The Morning Call
Phillies' Aaron Nola is becoming 'Mr. October' after years of September struggles
5 things that went right and 5 things that went wrong for the Phillies in first half – The Morning Call
WATCH: Phillies' Nick Castellanos preserves ninth-inning tie by throwing out Braves' Luke Williams at home
Young Phillies Fan Goes Viral After Giving Foul Ball To Crying Girl
Young Phillies Fan Goes Viral After Giving Foul Ball To Crying Girl
Internet Found Hilarious Reason Why Lance McCullers Got Shelled