Michael Vick played with two broken ribs in the Eagles' 21-17 loss to Arizona on Sunday.
Vick took a hard hit to the side early in the game and was slow to get up. He later sat out one play after a scramble.
Reid says the injury "probably had something to do" with Vick's inaccuracy. Vick was 16-of-34 for 128 yards and two interceptions.