Joe Thomas' greatest asset is consistency

Here is the best thing I can say about Cleveland Browns left tackle Joe Thomas: In covering his entire career, I can't remember Thomas having an awful game.

I've seen plenty of perfect outings where Thomas completely shut out his opponents. I've seen scores of great games where he's only had one or two mistakes. There have also been a handful of games -- usually against Baltimore or Pittsburgh -- where Thomas may have a back and forth for four quarters against great players like James Harrison or Terrell Suggs.

But never has Thomas been dominated or embarrassed -- and that's exactly what you want from a left tackle. Thomas thrives on consistency, and that's why he's been to four Pro Bowls in as many years and was voted the top left tackle in ESPN.com's Power Rankings.

With great feet and agility, Thomas is the prototype for today's left tackles. He's built tall and lean but still has enough strength to dominate in the running game. Thomas is fundamentally sound and there's no weakness in his game.

The Browns used three quarterbacks in 2010 and Thomas had a good but not great season. But the bar is set so high that even a "good" year from Thomas is still better than 95 percent of left tackles in the league.

ESPN.com's left tackle Power Rankings

1. Joe Thomas, Browns

2. Jake Long, Dolphins

3. Ryan Clady, Broncos

4. Jordan Gross, Panthers

5. D'Brickashaw Ferguson, Jets

6. Michael Roos, Titans

7. Jason Peters, Eagles

8 (tie). Donald Penn, Buccaneers

8 (tie). Marcus McNeill, Chargers

10. Matt Light, Patriots

Walker's left tackle Power Rankings

1. Joe Thomas, Browns

2. Jake Long, Dolphins

3. D’Brickashaw Ferguson, Jets

4. Matt Light, Patriots

5. Ryan Clady, Broncos

6. Marcus McNeil, Chargers

7. Jordan Gross, Panthers

8. Donald Penn, Buccaneers

9. Jason Peters, Eagles

10. Andrew Whitworth, Bengals