Seems like early in his career, he struggled a bit with injuries and maturity. He did not get along with Dallas' coach.
Then after a good year with Dallas, he decided he had to take a chance in England - failed in part due in part to too much a difference in soccer culture and part JAG.
Then Klinsman tried to change his position, but he doesn't have a defenders mentality and his ego was down due to his less than good on-the-field experience in England.
Last few years in MLS with Orlando and Vancouver haven't been bad, but he may be out of any legitimate MNT opportunities even though he played decently in his CAPs, especially in conacaf play a couple years ago.