It's no secret that the Arizona Cardinals have holes to fill on the offensive side of the ball.
The Cardinals started four different quarterbacks, gave up 58 sacks and were ranked last in the NFL in total rushing yards in 2012.
ESPN Insider and ex-NFL general manager Bill Polian pointed out obvious needs for Bruce Arians' team, but says one position may be irreparable in the open market.
Key need: QB
Quarterback is by far the most pressing need, but as with other teams on this list that lack a signal-caller, it doesn't look like it can be filled through free agency. Since that's the case, offensive line is the next area to explore on the free-agent market. The Cardinals gave up a league-high 58 sacks in 2012.
Polian's theory dismantles any speculation of the Cardinals reaching for San Francisco's Alex Smith, the Colts' Drew Stanton or even Tim Tebow, thus leaving Arizona with the NFL Draft, or what they've got in the bag.