Giroux sustained tendon damage when a golf club shattered and splintered into his finger Thursday. It's unknown what caused the club to shatter.
"Although there were no broken bones, there was some damage to his extensor tendons in his finger," Flyers general manager Paul Holmgren said in the statement. "He is expected to have a full recovery in 5-6 weeks."
Last month, Philadelphia signed Giroux to an eight-year contract extension worth more than $64 million.
Giroux was hurt playing overseas during the lockout last year and finished with only 13 goals and 48 points for the Flyers. He has 291 points (91 goals, 200 assists) in 333 career games spread over six seasons in Philadelphia.
Information from The Associated Press was used in this report.