The Kansas City Chiefs have had the best offense in the NFL during the first two weeks of the season as they've shifted from Alex Smith to Patrick Mahomes at quarterback and Matt Nagy to Eric Bieniemy at offensive coordinator.

An NFL Films video captures Chiefs receivers talking about the new-but-not-new offense during Sunday’s win at Pittsburgh.

“It’s stupid there with the new guy,” Tyreek Hill says. “It’s stupid.”

“Much easier,” adds another receiver (apparently Chris Conley, but it’s impossible to know for certain whether it’s his voice). “I ain’t gotta think.”

“On me, I just go out there and play,” Hill replies. “Because I know if I’m not gonna be open, y’all are gonna be open.”

Patrick Mahomes has been incredible for the Kansas City Chiefs through two games and Andy Reid credits someone no longer on the team.

"I will come back to last year and being in that room with Alex [Smith], having that opportunity to see how he worked," Reid said. "For a young guy, that's invaluable. Alex was not one who was going to hide anything or play games with him or anything like that. He kept it all out in the open and was secure enough, that wasn't a problem. He came into a good situation with Alex and I said that was priceless for him. There's no way he could repay Alex with having that experience. That was phenomenal."

Ready to turn to Mahomes this season, the Chiefs traded Smith to the Washington Redskins. Smith then signed a big deal with his new team.

The Kansas City Chiefs have signed Cameron Erving to a two-year extension, according to a source.

Erving had one season left on his existing contract.

The offensive tackle would make $10 million over the three seasons, but could earn more by moving into the starting lineup and hitting playing time incentives.

Patrick Mahomes will enter his first season as a starting quarterback on a Super Bowl contender.

Full List of Essential 50

50. Drew Brees

49. Larry Fitzgerald

48. DeForest Buckner

47. Adam Thielen

46. Eric Berry

45. Corey Davis

44. Ali Marpet

43. Sam Darnold

42. Golden Tate

41. Geno Atkins

40. Mitchell Trubisky

39. C.J. Mosley

38. Jameis Winston

37. Landon Collins

36. Vic Beasley Jr.

35. Ryan Tannehill

34. Amari Cooper 

33. Malcolm Jenkins

32. Christian McCaffrey

31. LeSean McCoy

30. Patrick Mahomes

29. Bradley Roby

28. Dalvin Cook

27. DeMarcus Lawrence

26. Russell Wilson

25. Cam Newton

24. Joey Bosa

23. Alex Smith

22. Alvin Kamara

21. Jadeveon Clowney

20. Jarvis Landry

19. David Johnson

18. Ezekiel Elliott 

17. Khalil Mack

16. Myles Garrett

15. Deshaun Watson

14. Carson Wentz

13. Todd Gurley

12. Rob Gronkowski

11. Jalen Ramsey

10. Aaron Rodgers

9. Earl Thomas

8. Aaron Donald

7. Odell Beckham Jr.

6. Ryan Shazier

5. Tom Brady

4. Julio Jones

3. Andrew Luck

2. Jimmy Garoppolo

1. Le'Veon Bell