Impossible to tell. There are plenty of great players at that age like Frank Lampard, Michael Ballack etc that make up for physical deterioration with experience and mental mastery. Because of that I think Clint will still be effective enough to be a key player near what he is now. Landon I'm not as sure because of his size. By then Stuart Holden will be in his prime and serving in killer crosses from the right wing and taking all the dead balls. Who knows what will happen in four years. Voros McCracken over at BigSoccer does a top100 list at the end/beginning of every cycle. Here are his top 33 midfielders for 2014: 1. Landon Donovan, 32, Los Angeles Galaxy 2. Michael Bradley, 27, Borussia Munchengladbach 3. Clint Dempsey, 31, Fulham 4. Jose Torres, 27, Pachuca 5. Maurice Edu, 28, Rangers 6. Stuart Holden, 29, Bolton Wanderers 7. Benny Feilhaber, 29, AGF Aarhus 8. Freddy Adu, 25, Benfica 9. Alejandro Bedoya, 27, Orebro SK 10. Geoff Cameron, 29, Houston Dynamo 11. Ricardo Clark, 31, Eintracht Frankfurt 12. Sebastian Lletget, 22, West Ham United 13. Luis Gil, 21, Real Salt Lake 14. Michael Stephens, 25, Los Angeles Galaxy 15. Sacha Kljestan, 29, Anderlecht 16. Jermaine Jones, 33, FC Schalke 17. Robbie Rogers, 27, Columbus Crew 18. Brad Evans, 29, Seattle Sounders 19. DaMarcus Beasley, 32, No Club 20. Michael Hoyos, 23, Estudiantes La Plata 21. Alex Zahavi, 23, Sporting Lisbon 22. Dax McCarty, 27, FC Dallas 23. Eddie Gaven, 28, Columbus Crew 24. Mikkel Diskerud, 24, Stabaek 25. Danny Cruz, 23, Houston Dynamo 26. Marco Vidal, 28, Pachuca 27. Blair Gavin, 25, Chivas USA 28. Lester Dewee, 22, Olympique de Marseilles 29. Brad Davis, 33, Houston Dynamo 30. Jared Jeffrey, 24, FSV Mainz 31. Baggio Husidic, 27, Chicago Fire 32. Sal Zizzo, 27, Hannover 96 33. Andrew Oliver, 20, Westside United Remember that some guys will come out of nowhere and some guys will fall off a cliff. Our midfield will be ok. Its our backline and keepers that are concerning.