Posted by ESPN.com's Mike Sando
PHOENIX -- NFC West teams are now 3-8 outside the division after going 2-2 in Week 5. Some of the worst losses resulted from injuries. Four to watch:
Michael Lewis, 49ers. The veteran strong safety was playing at a high level this season. The concussion he suffered against the Falcons was his third in the last two months. The 49ers have a bye in Week 6, but it's unclear how quickly Lewis will recover. This could be serious. The 49ers would miss Lewis' physical presence.
Brandon Frye, Seahawks. Seattle was down to its fourth-string left tackle after Frye suffered a stinger early in the game Sunday. Frye's replacement, Kyle Williams, suffered a sprained knee and had to keep playing because the Seahawks had nobody else. Starter Walter Jones remains out. Seattle needs to somehow get through Week 6 and into its bye before reassessing the position.
Gary Gibson, Rams. The starting defensive tackle suffered a broken foot and ankle against the Vikings. He's done for the season. The Rams have bigger worries, but Gibson was exceeding expectations, I thought.
Stephen Spach, Cardinals. The veteran tight end suffered an ankle injury and did not return. Arizona used snapper Mike Leach as an extra tight end while running out the clock. Fortunately for the Cardinals, projected starting tight end Ben Patrick returns from a four-game suspension in Week 6.