If Klay Thompson retired today would he have the greatest NBA career of any Coug? The only other contenders are James Donaldson, Craig Ehlo, and Gene Conley. Conley has 3 titles, Donaldson has 1 all star and longevity, Ehlo has some longevity. Thompson does have 2 all stars, 1 title, and an Olympic team, which wasn't really available for the other 3.