Indianapolis Colts quarterback Andrew Luck has been playing with multiple fractured ribs, FOX Sports NFL Insider Jay Glazer reported Sunday morning.

Luck, who missed several games with a separated shoulder, sustained both injuries in Week 3.

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Luck, who is in his fourth season with the Colts, has appeared to be off the mark as the Colts have lost their past two games despite the quarterback throwing for six touchdowns, two interceptions and 645 yards over that span.